21324280

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{593}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 29997320

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 31, 40, 58, 62, 116, 124, 145, 155, 232, 248, 290, 310, 580, 593, 620, 899, 1160, 1186, 1240, 1798, 2372, 2965, 3596, 4495, 4744, 5930, 7192, 8990, 11860, 17197, 17980, 18383, 23720, 34394, 35960, 36766, 68788, 73532, 85985, 91915, 137576, 147064, 171970, 183830, 343940, 367660, 533107, 687880, 735320, 1066214, 2132428, 2665535, 4264856, 5331070, 10662140, 21324280]

約数ペア:

[(1, 21324280), (2, 10662140), (4, 5331070), (5, 4264856), (8, 2665535), (10, 2132428), (20, 1066214), (29, 735320), (31, 687880), (40, 533107), (58, 367660), (62, 343940), (116, 183830), (124, 171970), (145, 147064), (155, 137576), (232, 91915), (248, 85985), (290, 73532), (310, 68788), (580, 36766), (593, 35960), (620, 34394), (899, 23720), (1160, 18383), (1186, 17980), (1240, 17197), (1798, 11860), (2372, 8990), (2965, 7192), (3596, 5930), (4495, 4744)]