12640225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 18748800

約数和(自身を除く): 6108575

約数列:

[1, 5, 13, 19, 23, 25, 65, 89, 95, 115, 247, 299, 325, 437, 445, 475, 575, 1157, 1235, 1495, 1691, 2047, 2185, 2225, 5681, 5785, 6175, 7475, 8455, 10235, 10925, 21983, 26611, 28405, 28925, 38893, 42275, 51175, 109915, 133055, 142025, 194465, 505609, 549575, 665275, 972325, 2528045, 12640225]

約数ペア:

[(1, 12640225), (5, 2528045), (13, 972325), (19, 665275), (23, 549575), (25, 505609), (65, 194465), (89, 142025), (95, 133055), (115, 109915), (247, 51175), (299, 42275), (325, 38893), (437, 28925), (445, 28405), (475, 26611), (575, 21983), (1157, 10925), (1235, 10235), (1495, 8455), (1691, 7475), (2047, 6175), (2185, 5785), (2225, 5681)]