20907280

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15373}}^1$

素因数の和:15403

約数の個数: 40

約数和(自身を含む): 51472152

約数和(自身を除く): 30564872

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15373, 30746, 61492, 76865, 122984, 153730, 245968, 261341, 307460, 522682, 614920, 1045364, 1229840, 1306705, 2090728, 2613410, 4181456, 5226820, 10453640, 20907280]

約数ペア:

[(1, 20907280), (2, 10453640), (4, 5226820), (5, 4181456), (8, 2613410), (10, 2090728), (16, 1306705), (17, 1229840), (20, 1045364), (34, 614920), (40, 522682), (68, 307460), (80, 261341), (85, 245968), (136, 153730), (170, 122984), (272, 76865), (340, 61492), (680, 30746), (1360, 15373)]