78969980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1\times {\mathrm{331}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 169559040

約数和(自身を除く): 90589060

約数列:

[1, 2, 4, 5, 10, 20, 79, 151, 158, 302, 316, 331, 395, 604, 662, 755, 790, 1324, 1510, 1580, 1655, 3020, 3310, 6620, 11929, 23858, 26149, 47716, 49981, 52298, 59645, 99962, 104596, 119290, 130745, 199924, 238580, 249905, 261490, 499810, 522980, 999620, 3948499, 7896998, 15793996, 19742495, 39484990, 78969980]

約数ペア:

[(1, 78969980), (2, 39484990), (4, 19742495), (5, 15793996), (10, 7896998), (20, 3948499), (79, 999620), (151, 522980), (158, 499810), (302, 261490), (316, 249905), (331, 238580), (395, 199924), (604, 130745), (662, 119290), (755, 104596), (790, 99962), (1324, 59645), (1510, 52298), (1580, 49981), (1655, 47716), (3020, 26149), (3310, 23858), (6620, 11929)]