19729980

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1$

素因数の和:681

約数の個数: 120

約数和(自身を含む): 65252880

約数和(自身を除く): 45522900

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, 162, 171, 180, 190, 228, 270, 285, 324, 342, 380, 405, 513, 540, 570, 641, 684, 810, 855, 1026, 1140, 1282, 1539, 1620, 1710, 1923, 2052, 2564, 2565, 3078, 3205, 3420, 3846, 5130, 5769, 6156, 6410, 7692, 7695, 9615, 10260, 11538, 12179, 12820, 15390, 17307, 19230, 23076, 24358, 28845, 30780, 34614, 36537, 38460, 48716, 51921, 57690, 60895, 69228, 73074, 86535, 103842, 109611, 115380, 121790, 146148, 173070, 182685, 207684, 219222, 243580, 259605, 328833, 346140, 365370, 438444, 519210, 548055, 657666, 730740, 986499, 1038420, 1096110, 1315332, 1644165, 1972998, 2192220, 3288330, 3945996, 4932495, 6576660, 9864990, 19729980]

約数ペア:

[(1, 19729980), (2, 9864990), (3, 6576660), (4, 4932495), (5, 3945996), (6, 3288330), (9, 2192220), (10, 1972998), (12, 1644165), (15, 1315332), (18, 1096110), (19, 1038420), (20, 986499), (27, 730740), (30, 657666), (36, 548055), (38, 519210), (45, 438444), (54, 365370), (57, 346140), (60, 328833), (76, 259605), (81, 243580), (90, 219222), (95, 207684), (108, 182685), (114, 173070), (135, 146148), (162, 121790), (171, 115380), (180, 109611), (190, 103842), (228, 86535), (270, 73074), (285, 69228), (324, 60895), (342, 57690), (380, 51921), (405, 48716), (513, 38460), (540, 36537), (570, 34614), (641, 30780), (684, 28845), (810, 24358), (855, 23076), (1026, 19230), (1140, 17307), (1282, 15390), (1539, 12820), (1620, 12179), (1710, 11538), (1923, 10260), (2052, 9615), (2564, 7695), (2565, 7692), (3078, 6410), (3205, 6156), (3420, 5769), (3846, 5130)]