20922520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{359}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 28843880

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 47, 62, 94, 124, 155, 188, 235, 248, 310, 359, 376, 470, 620, 718, 940, 1240, 1436, 1457, 1795, 1880, 2872, 2914, 3590, 5828, 7180, 7285, 11129, 11656, 14360, 14570, 16873, 22258, 29140, 33746, 44516, 55645, 58280, 67492, 84365, 89032, 111290, 134984, 168730, 222580, 337460, 445160, 523063, 674920, 1046126, 2092252, 2615315, 4184504, 5230630, 10461260, 20922520]

約数ペア:

[(1, 20922520), (2, 10461260), (4, 5230630), (5, 4184504), (8, 2615315), (10, 2092252), (20, 1046126), (31, 674920), (40, 523063), (47, 445160), (62, 337460), (94, 222580), (124, 168730), (155, 134984), (188, 111290), (235, 89032), (248, 84365), (310, 67492), (359, 58280), (376, 55645), (470, 44516), (620, 33746), (718, 29140), (940, 22258), (1240, 16873), (1436, 14570), (1457, 14360), (1795, 11656), (1880, 11129), (2872, 7285), (2914, 7180), (3590, 5828)]