28784080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2129}}^1$

素因数の和:2168

約数の個数: 60

約数和(自身を含む): 72500940

約数和(自身を除く): 43716860

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, 1690, 2129, 2704, 3380, 4258, 6760, 8516, 10645, 13520, 17032, 21290, 27677, 34064, 42580, 55354, 85160, 110708, 138385, 170320, 221416, 276770, 359801, 442832, 553540, 719602, 1107080, 1439204, 1799005, 2214160, 2878408, 3598010, 5756816, 7196020, 14392040, 28784080]

約数ペア:

[(1, 28784080), (2, 14392040), (4, 7196020), (5, 5756816), (8, 3598010), (10, 2878408), (13, 2214160), (16, 1799005), (20, 1439204), (26, 1107080), (40, 719602), (52, 553540), (65, 442832), (80, 359801), (104, 276770), (130, 221416), (169, 170320), (208, 138385), (260, 110708), (338, 85160), (520, 55354), (676, 42580), (845, 34064), (1040, 27677), (1352, 21290), (1690, 17032), (2129, 13520), (2704, 10645), (3380, 8516), (4258, 6760)]