28478060

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{379}}^1$

素因数の和:435

約数の個数: 72

約数和(自身を含む): 68596080

約数和(自身を除く): 40118020

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 289, 340, 379, 442, 578, 758, 884, 1105, 1156, 1445, 1516, 1895, 2210, 2890, 3757, 3790, 4420, 4927, 5780, 6443, 7514, 7580, 9854, 12886, 15028, 18785, 19708, 24635, 25772, 32215, 37570, 49270, 64430, 75140, 83759, 98540, 109531, 128860, 167518, 219062, 335036, 418795, 438124, 547655, 837590, 1095310, 1423903, 1675180, 2190620, 2847806, 5695612, 7119515, 14239030, 28478060]

約数ペア:

[(1, 28478060), (2, 14239030), (4, 7119515), (5, 5695612), (10, 2847806), (13, 2190620), (17, 1675180), (20, 1423903), (26, 1095310), (34, 837590), (52, 547655), (65, 438124), (68, 418795), (85, 335036), (130, 219062), (170, 167518), (221, 128860), (260, 109531), (289, 98540), (340, 83759), (379, 75140), (442, 64430), (578, 49270), (758, 37570), (884, 32215), (1105, 25772), (1156, 24635), (1445, 19708), (1516, 18785), (1895, 15028), (2210, 12886), (2890, 9854), (3757, 7580), (3790, 7514), (4420, 6443), (4927, 5780)]