21075180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{139}}^1$

素因数の和:196

約数の個数: 144

約数和(自身を含む): 71688960

約数和(自身を除く): 50613780

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 57, 60, 70, 76, 84, 95, 105, 114, 133, 139, 140, 190, 210, 228, 266, 278, 285, 361, 380, 399, 417, 420, 532, 556, 570, 665, 695, 722, 798, 834, 973, 1083, 1140, 1330, 1390, 1444, 1596, 1668, 1805, 1946, 1995, 2085, 2166, 2527, 2641, 2660, 2780, 2919, 3610, 3892, 3990, 4170, 4332, 4865, 5054, 5282, 5415, 5838, 7220, 7581, 7923, 7980, 8340, 9730, 10108, 10564, 10830, 11676, 12635, 13205, 14595, 15162, 15846, 18487, 19460, 21660, 25270, 26410, 29190, 30324, 31692, 36974, 37905, 39615, 50179, 50540, 52820, 55461, 58380, 73948, 75810, 79230, 92435, 100358, 110922, 150537, 151620, 158460, 184870, 200716, 221844, 250895, 277305, 301074, 351253, 369740, 501790, 554610, 602148, 702506, 752685, 1003580, 1053759, 1109220, 1405012, 1505370, 1756265, 2107518, 3010740, 3512530, 4215036, 5268795, 7025060, 10537590, 21075180]

約数ペア:

[(1, 21075180), (2, 10537590), (3, 7025060), (4, 5268795), (5, 4215036), (6, 3512530), (7, 3010740), (10, 2107518), (12, 1756265), (14, 1505370), (15, 1405012), (19, 1109220), (20, 1053759), (21, 1003580), (28, 752685), (30, 702506), (35, 602148), (38, 554610), (42, 501790), (57, 369740), (60, 351253), (70, 301074), (76, 277305), (84, 250895), (95, 221844), (105, 200716), (114, 184870), (133, 158460), (139, 151620), (140, 150537), (190, 110922), (210, 100358), (228, 92435), (266, 79230), (278, 75810), (285, 73948), (361, 58380), (380, 55461), (399, 52820), (417, 50540), (420, 50179), (532, 39615), (556, 37905), (570, 36974), (665, 31692), (695, 30324), (722, 29190), (798, 26410), (834, 25270), (973, 21660), (1083, 19460), (1140, 18487), (1330, 15846), (1390, 15162), (1444, 14595), (1596, 13205), (1668, 12635), (1805, 11676), (1946, 10830), (1995, 10564), (2085, 10108), (2166, 9730), (2527, 8340), (2641, 7980), (2660, 7923), (2780, 7581), (2919, 7220), (3610, 5838), (3892, 5415), (3990, 5282), (4170, 5054), (4332, 4865)]