20898120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{349}}^1\times {\mathrm{499}}^1$

素因数の和:862

約数の個数: 64

約数和(自身を含む): 63000000

約数和(自身を除く): 42101880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 349, 499, 698, 998, 1047, 1396, 1497, 1745, 1996, 2094, 2495, 2792, 2994, 3490, 3992, 4188, 4990, 5235, 5988, 6980, 7485, 8376, 9980, 10470, 11976, 13960, 14970, 19960, 20940, 29940, 41880, 59880, 174151, 348302, 522453, 696604, 870755, 1044906, 1393208, 1741510, 2089812, 2612265, 3483020, 4179624, 5224530, 6966040, 10449060, 20898120]

約数ペア:

[(1, 20898120), (2, 10449060), (3, 6966040), (4, 5224530), (5, 4179624), (6, 3483020), (8, 2612265), (10, 2089812), (12, 1741510), (15, 1393208), (20, 1044906), (24, 870755), (30, 696604), (40, 522453), (60, 348302), (120, 174151), (349, 59880), (499, 41880), (698, 29940), (998, 20940), (1047, 19960), (1396, 14970), (1497, 13960), (1745, 11976), (1996, 10470), (2094, 9980), (2495, 8376), (2792, 7485), (2994, 6980), (3490, 5988), (3992, 5235), (4188, 4990)]