21315420

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{5639}}^1$

素因数の和:5664

約数の個数: 96

約数和(自身を含む): 75801600

約数和(自身を除く): 54486180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 84, 90, 105, 108, 126, 135, 140, 180, 189, 210, 252, 270, 315, 378, 420, 540, 630, 756, 945, 1260, 1890, 3780, 5639, 11278, 16917, 22556, 28195, 33834, 39473, 50751, 56390, 67668, 78946, 84585, 101502, 112780, 118419, 152253, 157892, 169170, 197365, 203004, 236838, 253755, 304506, 338340, 355257, 394730, 473676, 507510, 592095, 609012, 710514, 761265, 789460, 1015020, 1065771, 1184190, 1421028, 1522530, 1776285, 2131542, 2368380, 3045060, 3552570, 4263084, 5328855, 7105140, 10657710, 21315420]

約数ペア:

[(1, 21315420), (2, 10657710), (3, 7105140), (4, 5328855), (5, 4263084), (6, 3552570), (7, 3045060), (9, 2368380), (10, 2131542), (12, 1776285), (14, 1522530), (15, 1421028), (18, 1184190), (20, 1065771), (21, 1015020), (27, 789460), (28, 761265), (30, 710514), (35, 609012), (36, 592095), (42, 507510), (45, 473676), (54, 394730), (60, 355257), (63, 338340), (70, 304506), (84, 253755), (90, 236838), (105, 203004), (108, 197365), (126, 169170), (135, 157892), (140, 152253), (180, 118419), (189, 112780), (210, 101502), (252, 84585), (270, 78946), (315, 67668), (378, 56390), (420, 50751), (540, 39473), (630, 33834), (756, 28195), (945, 22556), (1260, 16917), (1890, 11278), (3780, 5639)]