20283380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{353}}^1$

素因数の和:405

約数の個数: 72

約数和(自身を含む): 48975192

約数和(自身を除く): 28691812

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 169, 170, 221, 260, 338, 340, 353, 442, 676, 706, 845, 884, 1105, 1412, 1690, 1765, 2210, 2873, 3380, 3530, 4420, 4589, 5746, 6001, 7060, 9178, 11492, 12002, 14365, 18356, 22945, 24004, 28730, 30005, 45890, 57460, 59657, 60010, 78013, 91780, 119314, 120020, 156026, 238628, 298285, 312052, 390065, 596570, 780130, 1014169, 1193140, 1560260, 2028338, 4056676, 5070845, 10141690, 20283380]

約数ペア:

[(1, 20283380), (2, 10141690), (4, 5070845), (5, 4056676), (10, 2028338), (13, 1560260), (17, 1193140), (20, 1014169), (26, 780130), (34, 596570), (52, 390065), (65, 312052), (68, 298285), (85, 238628), (130, 156026), (169, 120020), (170, 119314), (221, 91780), (260, 78013), (338, 60010), (340, 59657), (353, 57460), (442, 45890), (676, 30005), (706, 28730), (845, 24004), (884, 22945), (1105, 18356), (1412, 14365), (1690, 12002), (1765, 11492), (2210, 9178), (2873, 7060), (3380, 6001), (3530, 5746), (4420, 4589)]