20425280

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:148

約数の個数: 112

約数和(自身を含む): 52669440

約数和(自身を除く): 32244160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 32, 40, 58, 62, 64, 71, 80, 116, 124, 142, 145, 155, 160, 232, 248, 284, 290, 310, 320, 355, 464, 496, 568, 580, 620, 710, 899, 928, 992, 1136, 1160, 1240, 1420, 1798, 1856, 1984, 2059, 2201, 2272, 2320, 2480, 2840, 3596, 4118, 4402, 4495, 4544, 4640, 4960, 5680, 7192, 8236, 8804, 8990, 9280, 9920, 10295, 11005, 11360, 14384, 16472, 17608, 17980, 20590, 22010, 22720, 28768, 32944, 35216, 35960, 41180, 44020, 57536, 63829, 65888, 70432, 71920, 82360, 88040, 127658, 131776, 140864, 143840, 164720, 176080, 255316, 287680, 319145, 329440, 352160, 510632, 638290, 658880, 704320, 1021264, 1276580, 2042528, 2553160, 4085056, 5106320, 10212640, 20425280]

約数ペア:

[(1, 20425280), (2, 10212640), (4, 5106320), (5, 4085056), (8, 2553160), (10, 2042528), (16, 1276580), (20, 1021264), (29, 704320), (31, 658880), (32, 638290), (40, 510632), (58, 352160), (62, 329440), (64, 319145), (71, 287680), (80, 255316), (116, 176080), (124, 164720), (142, 143840), (145, 140864), (155, 131776), (160, 127658), (232, 88040), (248, 82360), (284, 71920), (290, 70432), (310, 65888), (320, 63829), (355, 57536), (464, 44020), (496, 41180), (568, 35960), (580, 35216), (620, 32944), (710, 28768), (899, 22720), (928, 22010), (992, 20590), (1136, 17980), (1160, 17608), (1240, 16472), (1420, 14384), (1798, 11360), (1856, 11005), (1984, 10295), (2059, 9920), (2201, 9280), (2272, 8990), (2320, 8804), (2480, 8236), (2840, 7192), (3596, 5680), (4118, 4960), (4402, 4640), (4495, 4544)]