18912920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{983}}^1$

素因数の和:1044

約数の個数: 64

約数和(自身を含む): 47113920

約数和(自身を除く): 28201000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 148, 185, 260, 296, 370, 481, 520, 740, 962, 983, 1480, 1924, 1966, 2405, 3848, 3932, 4810, 4915, 7864, 9620, 9830, 12779, 19240, 19660, 25558, 36371, 39320, 51116, 63895, 72742, 102232, 127790, 145484, 181855, 255580, 290968, 363710, 472823, 511160, 727420, 945646, 1454840, 1891292, 2364115, 3782584, 4728230, 9456460, 18912920]

約数ペア:

[(1, 18912920), (2, 9456460), (4, 4728230), (5, 3782584), (8, 2364115), (10, 1891292), (13, 1454840), (20, 945646), (26, 727420), (37, 511160), (40, 472823), (52, 363710), (65, 290968), (74, 255580), (104, 181855), (130, 145484), (148, 127790), (185, 102232), (260, 72742), (296, 63895), (370, 51116), (481, 39320), (520, 36371), (740, 25558), (962, 19660), (983, 19240), (1480, 12779), (1924, 9830), (1966, 9620), (2405, 7864), (3848, 4915), (3932, 4810)]