20992920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13457}}^1$

素因数の和:13484

約数の個数: 64

約数和(自身を含む): 67828320

約数和(自身を除く): 46835400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13457, 26914, 40371, 53828, 67285, 80742, 107656, 134570, 161484, 174941, 201855, 269140, 322968, 349882, 403710, 524823, 538280, 699764, 807420, 874705, 1049646, 1399528, 1614840, 1749410, 2099292, 2624115, 3498820, 4198584, 5248230, 6997640, 10496460, 20992920]

約数ペア:

[(1, 20992920), (2, 10496460), (3, 6997640), (4, 5248230), (5, 4198584), (6, 3498820), (8, 2624115), (10, 2099292), (12, 1749410), (13, 1614840), (15, 1399528), (20, 1049646), (24, 874705), (26, 807420), (30, 699764), (39, 538280), (40, 524823), (52, 403710), (60, 349882), (65, 322968), (78, 269140), (104, 201855), (120, 174941), (130, 161484), (156, 134570), (195, 107656), (260, 80742), (312, 67285), (390, 53828), (520, 40371), (780, 26914), (1560, 13457)]