81289980

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{139}}^1$

素因数の和:198

約数の個数: 180

約数和(自身を含む): 271073880

約数和(自身を除く): 189783900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 81, 90, 95, 108, 114, 135, 139, 162, 171, 180, 190, 228, 270, 278, 285, 324, 342, 361, 380, 405, 417, 513, 540, 556, 570, 684, 695, 722, 810, 834, 855, 1026, 1083, 1140, 1251, 1390, 1444, 1539, 1620, 1668, 1710, 1805, 2052, 2085, 2166, 2502, 2565, 2641, 2780, 3078, 3249, 3420, 3610, 3753, 4170, 4332, 5004, 5130, 5282, 5415, 6156, 6255, 6498, 7220, 7506, 7695, 7923, 8340, 9747, 10260, 10564, 10830, 11259, 12510, 12996, 13205, 15012, 15390, 15846, 16245, 18765, 19494, 21660, 22518, 23769, 25020, 26410, 29241, 30780, 31692, 32490, 37530, 38988, 39615, 45036, 47538, 48735, 50179, 52820, 56295, 58482, 64980, 71307, 75060, 79230, 95076, 97470, 100358, 112590, 116964, 118845, 142614, 146205, 150537, 158460, 194940, 200716, 213921, 225180, 237690, 250895, 285228, 292410, 301074, 356535, 427842, 451611, 475380, 501790, 584820, 602148, 713070, 752685, 855684, 903222, 1003580, 1069605, 1354833, 1426140, 1505370, 1806444, 2139210, 2258055, 2709666, 3010740, 4064499, 4278420, 4516110, 5419332, 6774165, 8128998, 9032220, 13548330, 16257996, 20322495, 27096660, 40644990, 81289980]

約数ペア:

[(1, 81289980), (2, 40644990), (3, 27096660), (4, 20322495), (5, 16257996), (6, 13548330), (9, 9032220), (10, 8128998), (12, 6774165), (15, 5419332), (18, 4516110), (19, 4278420), (20, 4064499), (27, 3010740), (30, 2709666), (36, 2258055), (38, 2139210), (45, 1806444), (54, 1505370), (57, 1426140), (60, 1354833), (76, 1069605), (81, 1003580), (90, 903222), (95, 855684), (108, 752685), (114, 713070), (135, 602148), (139, 584820), (162, 501790), (171, 475380), (180, 451611), (190, 427842), (228, 356535), (270, 301074), (278, 292410), (285, 285228), (324, 250895), (342, 237690), (361, 225180), (380, 213921), (405, 200716), (417, 194940), (513, 158460), (540, 150537), (556, 146205), (570, 142614), (684, 118845), (695, 116964), (722, 112590), (810, 100358), (834, 97470), (855, 95076), (1026, 79230), (1083, 75060), (1140, 71307), (1251, 64980), (1390, 58482), (1444, 56295), (1539, 52820), (1620, 50179), (1668, 48735), (1710, 47538), (1805, 45036), (2052, 39615), (2085, 38988), (2166, 37530), (2502, 32490), (2565, 31692), (2641, 30780), (2780, 29241), (3078, 26410), (3249, 25020), (3420, 23769), (3610, 22518), (3753, 21660), (4170, 19494), (4332, 18765), (5004, 16245), (5130, 15846), (5282, 15390), (5415, 15012), (6156, 13205), (6255, 12996), (6498, 12510), (7220, 11259), (7506, 10830), (7695, 10564), (7923, 10260), (8340, 9747)]