20351380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{503}}^1$

素因数の和:553

約数の個数: 72

約数和(自身を含む): 51988608

約数和(自身を除く): 31637228

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 289, 340, 476, 503, 578, 595, 1006, 1156, 1190, 1445, 2012, 2023, 2380, 2515, 2890, 3521, 4046, 5030, 5780, 7042, 8092, 8551, 10060, 10115, 14084, 17102, 17605, 20230, 34204, 35210, 40460, 42755, 59857, 70420, 85510, 119714, 145367, 171020, 239428, 290734, 299285, 581468, 598570, 726835, 1017569, 1197140, 1453670, 2035138, 2907340, 4070276, 5087845, 10175690, 20351380]

約数ペア:

[(1, 20351380), (2, 10175690), (4, 5087845), (5, 4070276), (7, 2907340), (10, 2035138), (14, 1453670), (17, 1197140), (20, 1017569), (28, 726835), (34, 598570), (35, 581468), (68, 299285), (70, 290734), (85, 239428), (119, 171020), (140, 145367), (170, 119714), (238, 85510), (289, 70420), (340, 59857), (476, 42755), (503, 40460), (578, 35210), (595, 34204), (1006, 20230), (1156, 17605), (1190, 17102), (1445, 14084), (2012, 10115), (2023, 10060), (2380, 8551), (2515, 8092), (2890, 7042), (3521, 5780), (4046, 5030)]