21951410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:483

約数の個数: 48

約数和(自身を含む): 44271360

約数和(自身を除く): 22319950

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 169, 310, 338, 403, 419, 806, 838, 845, 1690, 2015, 2095, 4030, 4190, 5239, 5447, 10478, 10894, 12989, 25978, 26195, 27235, 52390, 54470, 64945, 70811, 129890, 141622, 168857, 337714, 354055, 708110, 844285, 1688570, 2195141, 4390282, 10975705, 21951410]

約数ペア:

[(1, 21951410), (2, 10975705), (5, 4390282), (10, 2195141), (13, 1688570), (26, 844285), (31, 708110), (62, 354055), (65, 337714), (130, 168857), (155, 141622), (169, 129890), (310, 70811), (338, 64945), (403, 54470), (419, 52390), (806, 27235), (838, 26195), (845, 25978), (1690, 12989), (2015, 10894), (2095, 10478), (4030, 5447), (4190, 5239)]