20505380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{983}}^1$

素因数の和:1148

約数の個数: 48

約数和(自身を含む): 49593600

約数和(自身を除く): 29088220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 983, 1043, 1490, 1966, 2086, 2980, 3932, 4172, 4915, 5215, 6881, 9830, 10430, 13762, 19660, 20860, 27524, 34405, 68810, 137620, 146467, 292934, 585868, 732335, 1025269, 1464670, 2050538, 2929340, 4101076, 5126345, 10252690, 20505380]

約数ペア:

[(1, 20505380), (2, 10252690), (4, 5126345), (5, 4101076), (7, 2929340), (10, 2050538), (14, 1464670), (20, 1025269), (28, 732335), (35, 585868), (70, 292934), (140, 146467), (149, 137620), (298, 68810), (596, 34405), (745, 27524), (983, 20860), (1043, 19660), (1490, 13762), (1966, 10430), (2086, 9830), (2980, 6881), (3932, 5215), (4172, 4915)]