20864440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{503}}^1$

素因数の和:592

約数の個数: 64

約数和(自身を含む): 50621760

約数和(自身を除く): 29757320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 488, 503, 610, 680, 1006, 1037, 1220, 2012, 2074, 2440, 2515, 4024, 4148, 5030, 5185, 8296, 8551, 10060, 10370, 17102, 20120, 20740, 30683, 34204, 41480, 42755, 61366, 68408, 85510, 122732, 153415, 171020, 245464, 306830, 342040, 521611, 613660, 1043222, 1227320, 2086444, 2608055, 4172888, 5216110, 10432220, 20864440]

約数ペア:

[(1, 20864440), (2, 10432220), (4, 5216110), (5, 4172888), (8, 2608055), (10, 2086444), (17, 1227320), (20, 1043222), (34, 613660), (40, 521611), (61, 342040), (68, 306830), (85, 245464), (122, 171020), (136, 153415), (170, 122732), (244, 85510), (305, 68408), (340, 61366), (488, 42755), (503, 41480), (610, 34204), (680, 30683), (1006, 20740), (1037, 20120), (1220, 17102), (2012, 10370), (2074, 10060), (2440, 8551), (2515, 8296), (4024, 5185), (4148, 5030)]