21084080

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{419}}^1$

素因数の和:486

約数の個数: 80

約数和(自身を含む): 53434080

約数和(自身を除く): 32350000

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 37, 40, 68, 74, 80, 85, 136, 148, 170, 185, 272, 296, 340, 370, 419, 592, 629, 680, 740, 838, 1258, 1360, 1480, 1676, 2095, 2516, 2960, 3145, 3352, 4190, 5032, 6290, 6704, 7123, 8380, 10064, 12580, 14246, 15503, 16760, 25160, 28492, 31006, 33520, 35615, 50320, 56984, 62012, 71230, 77515, 113968, 124024, 142460, 155030, 248048, 263551, 284920, 310060, 527102, 569840, 620120, 1054204, 1240240, 1317755, 2108408, 2635510, 4216816, 5271020, 10542040, 21084080]

約数ペア:

[(1, 21084080), (2, 10542040), (4, 5271020), (5, 4216816), (8, 2635510), (10, 2108408), (16, 1317755), (17, 1240240), (20, 1054204), (34, 620120), (37, 569840), (40, 527102), (68, 310060), (74, 284920), (80, 263551), (85, 248048), (136, 155030), (148, 142460), (170, 124024), (185, 113968), (272, 77515), (296, 71230), (340, 62012), (370, 56984), (419, 50320), (592, 35615), (629, 33520), (680, 31006), (740, 28492), (838, 25160), (1258, 16760), (1360, 15503), (1480, 14246), (1676, 12580), (2095, 10064), (2516, 8380), (2960, 7123), (3145, 6704), (3352, 6290), (4190, 5032)]