17986820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{433}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 39664128

約数和(自身を除く): 21677308

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 67, 124, 134, 155, 268, 310, 335, 433, 620, 670, 866, 1340, 1732, 2077, 2165, 4154, 4330, 8308, 8660, 10385, 13423, 20770, 26846, 29011, 41540, 53692, 58022, 67115, 116044, 134230, 145055, 268460, 290110, 580220, 899341, 1798682, 3597364, 4496705, 8993410, 17986820]

約数ペア:

[(1, 17986820), (2, 8993410), (4, 4496705), (5, 3597364), (10, 1798682), (20, 899341), (31, 580220), (62, 290110), (67, 268460), (124, 145055), (134, 134230), (155, 116044), (268, 67115), (310, 58022), (335, 53692), (433, 41540), (620, 29011), (670, 26846), (866, 20770), (1340, 13423), (1732, 10385), (2077, 8660), (2165, 8308), (4154, 4330)]