20486660

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 44900352

約数和(自身を除く): 24413692

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 173, 191, 310, 346, 382, 620, 692, 764, 865, 955, 1730, 1910, 3460, 3820, 5363, 5921, 10726, 11842, 21452, 23684, 26815, 29605, 33043, 53630, 59210, 66086, 107260, 118420, 132172, 165215, 330430, 660860, 1024333, 2048666, 4097332, 5121665, 10243330, 20486660]

約数ペア:

[(1, 20486660), (2, 10243330), (4, 5121665), (5, 4097332), (10, 2048666), (20, 1024333), (31, 660860), (62, 330430), (124, 165215), (155, 132172), (173, 118420), (191, 107260), (310, 66086), (346, 59210), (382, 53630), (620, 33043), (692, 29605), (764, 26815), (865, 23684), (955, 21452), (1730, 11842), (1910, 10726), (3460, 5921), (3820, 5363)]