21568040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:139

約数の個数: 128

約数和(自身を含む): 57456000

約数和(自身を除く): 35887960

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 37, 38, 40, 52, 59, 65, 74, 76, 95, 104, 118, 130, 148, 152, 185, 190, 236, 247, 260, 295, 296, 370, 380, 472, 481, 494, 520, 590, 703, 740, 760, 767, 962, 988, 1121, 1180, 1235, 1406, 1480, 1534, 1924, 1976, 2183, 2242, 2360, 2405, 2470, 2812, 3068, 3515, 3835, 3848, 4366, 4484, 4810, 4940, 5605, 5624, 6136, 7030, 7670, 8732, 8968, 9139, 9620, 9880, 10915, 11210, 14060, 14573, 15340, 17464, 18278, 19240, 21830, 22420, 28120, 28379, 29146, 30680, 36556, 41477, 43660, 44840, 45695, 56758, 58292, 72865, 73112, 82954, 87320, 91390, 113516, 116584, 141895, 145730, 165908, 182780, 207385, 227032, 283790, 291460, 331816, 365560, 414770, 539201, 567580, 582920, 829540, 1078402, 1135160, 1659080, 2156804, 2696005, 4313608, 5392010, 10784020, 21568040]

約数ペア:

[(1, 21568040), (2, 10784020), (4, 5392010), (5, 4313608), (8, 2696005), (10, 2156804), (13, 1659080), (19, 1135160), (20, 1078402), (26, 829540), (37, 582920), (38, 567580), (40, 539201), (52, 414770), (59, 365560), (65, 331816), (74, 291460), (76, 283790), (95, 227032), (104, 207385), (118, 182780), (130, 165908), (148, 145730), (152, 141895), (185, 116584), (190, 113516), (236, 91390), (247, 87320), (260, 82954), (295, 73112), (296, 72865), (370, 58292), (380, 56758), (472, 45695), (481, 44840), (494, 43660), (520, 41477), (590, 36556), (703, 30680), (740, 29146), (760, 28379), (767, 28120), (962, 22420), (988, 21830), (1121, 19240), (1180, 18278), (1235, 17464), (1406, 15340), (1480, 14573), (1534, 14060), (1924, 11210), (1976, 10915), (2183, 9880), (2242, 9620), (2360, 9139), (2405, 8968), (2470, 8732), (2812, 7670), (3068, 7030), (3515, 6136), (3835, 5624), (3848, 5605), (4366, 4940), (4484, 4810)]