20023120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1481}}^1$

素因数の和:1520

約数の個数: 60

約数和(自身を含む): 50444316

約数和(自身を除く): 30421196

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1481, 1690, 2704, 2962, 3380, 5924, 6760, 7405, 11848, 13520, 14810, 19253, 23696, 29620, 38506, 59240, 77012, 96265, 118480, 154024, 192530, 250289, 308048, 385060, 500578, 770120, 1001156, 1251445, 1540240, 2002312, 2502890, 4004624, 5005780, 10011560, 20023120]

約数ペア:

[(1, 20023120), (2, 10011560), (4, 5005780), (5, 4004624), (8, 2502890), (10, 2002312), (13, 1540240), (16, 1251445), (20, 1001156), (26, 770120), (40, 500578), (52, 385060), (65, 308048), (80, 250289), (104, 192530), (130, 154024), (169, 118480), (208, 96265), (260, 77012), (338, 59240), (520, 38506), (676, 29620), (845, 23696), (1040, 19253), (1352, 14810), (1481, 13520), (1690, 11848), (2704, 7405), (2962, 6760), (3380, 5924)]