21705920

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{2339}}^1$

素因数の和:2385

約数の個数: 56

約数和(自身を含む): 53492400

約数和(自身を除く): 31786480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 145, 160, 232, 290, 320, 464, 580, 928, 1160, 1856, 2320, 2339, 4640, 4678, 9280, 9356, 11695, 18712, 23390, 37424, 46780, 67831, 74848, 93560, 135662, 149696, 187120, 271324, 339155, 374240, 542648, 678310, 748480, 1085296, 1356620, 2170592, 2713240, 4341184, 5426480, 10852960, 21705920]

約数ペア:

[(1, 21705920), (2, 10852960), (4, 5426480), (5, 4341184), (8, 2713240), (10, 2170592), (16, 1356620), (20, 1085296), (29, 748480), (32, 678310), (40, 542648), (58, 374240), (64, 339155), (80, 271324), (116, 187120), (145, 149696), (160, 135662), (232, 93560), (290, 74848), (320, 67831), (464, 46780), (580, 37424), (928, 23390), (1160, 18712), (1856, 11695), (2320, 9356), (2339, 9280), (4640, 4678)]