20883820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{257}}^1$

素因数の和:522

約数の個数: 48

約数和(自身を含む): 46811520

約数和(自身を除く): 25927700

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 239, 257, 340, 478, 514, 956, 1028, 1195, 1285, 2390, 2570, 4063, 4369, 4780, 5140, 8126, 8738, 16252, 17476, 20315, 21845, 40630, 43690, 61423, 81260, 87380, 122846, 245692, 307115, 614230, 1044191, 1228460, 2088382, 4176764, 5220955, 10441910, 20883820]

約数ペア:

[(1, 20883820), (2, 10441910), (4, 5220955), (5, 4176764), (10, 2088382), (17, 1228460), (20, 1044191), (34, 614230), (68, 307115), (85, 245692), (170, 122846), (239, 87380), (257, 81260), (340, 61423), (478, 43690), (514, 40630), (956, 21845), (1028, 20315), (1195, 17476), (1285, 16252), (2390, 8738), (2570, 8126), (4063, 5140), (4369, 4780)]