20637850

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:415

約数の個数: 48

約数和(自身を含む): 40756320

約数和(自身を除く): 20118470

約数列:

[1, 2, 5, 10, 25, 29, 43, 50, 58, 86, 145, 215, 290, 331, 430, 662, 725, 1075, 1247, 1450, 1655, 2150, 2494, 3310, 6235, 8275, 9599, 12470, 14233, 16550, 19198, 28466, 31175, 47995, 62350, 71165, 95990, 142330, 239975, 355825, 412757, 479950, 711650, 825514, 2063785, 4127570, 10318925, 20637850]

約数ペア:

[(1, 20637850), (2, 10318925), (5, 4127570), (10, 2063785), (25, 825514), (29, 711650), (43, 479950), (50, 412757), (58, 355825), (86, 239975), (145, 142330), (215, 95990), (290, 71165), (331, 62350), (430, 47995), (662, 31175), (725, 28466), (1075, 19198), (1247, 16550), (1450, 14233), (1655, 12470), (2150, 9599), (2494, 8275), (3310, 6235)]