20900750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 43243200

約数和(自身を除く): 22342450

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 59, 65, 109, 118, 125, 130, 218, 250, 295, 325, 545, 590, 650, 767, 1090, 1417, 1475, 1534, 1625, 2725, 2834, 2950, 3250, 3835, 5450, 6431, 7085, 7375, 7670, 12862, 13625, 14170, 14750, 19175, 27250, 32155, 35425, 38350, 64310, 70850, 83603, 95875, 160775, 167206, 177125, 191750, 321550, 354250, 418015, 803875, 836030, 1607750, 2090075, 4180150, 10450375, 20900750]

約数ペア:

[(1, 20900750), (2, 10450375), (5, 4180150), (10, 2090075), (13, 1607750), (25, 836030), (26, 803875), (50, 418015), (59, 354250), (65, 321550), (109, 191750), (118, 177125), (125, 167206), (130, 160775), (218, 95875), (250, 83603), (295, 70850), (325, 64310), (545, 38350), (590, 35425), (650, 32155), (767, 27250), (1090, 19175), (1417, 14750), (1475, 14170), (1534, 13625), (1625, 12862), (2725, 7670), (2834, 7375), (2950, 7085), (3250, 6431), (3835, 5450)]