20326700

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 46663680

約数和(自身を除く): 26336980

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 79, 83, 100, 124, 155, 158, 166, 310, 316, 332, 395, 415, 620, 775, 790, 830, 1550, 1580, 1660, 1975, 2075, 2449, 2573, 3100, 3950, 4150, 4898, 5146, 6557, 7900, 8300, 9796, 10292, 12245, 12865, 13114, 24490, 25730, 26228, 32785, 48980, 51460, 61225, 64325, 65570, 122450, 128650, 131140, 163925, 203267, 244900, 257300, 327850, 406534, 655700, 813068, 1016335, 2032670, 4065340, 5081675, 10163350, 20326700]

約数ペア:

[(1, 20326700), (2, 10163350), (4, 5081675), (5, 4065340), (10, 2032670), (20, 1016335), (25, 813068), (31, 655700), (50, 406534), (62, 327850), (79, 257300), (83, 244900), (100, 203267), (124, 163925), (155, 131140), (158, 128650), (166, 122450), (310, 65570), (316, 64325), (332, 61225), (395, 51460), (415, 48980), (620, 32785), (775, 26228), (790, 25730), (830, 24490), (1550, 13114), (1580, 12865), (1660, 12245), (1975, 10292), (2075, 9796), (2449, 8300), (2573, 7900), (3100, 6557), (3950, 5146), (4150, 4898)]