20205440

素因数分解:

$2^7\times 5^1\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:391

約数の個数: 64

約数和(自身を含む): 48874320

約数和(自身を除く): 28668880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 131, 160, 241, 262, 320, 482, 524, 640, 655, 964, 1048, 1205, 1310, 1928, 2096, 2410, 2620, 3856, 4192, 4820, 5240, 7712, 8384, 9640, 10480, 15424, 16768, 19280, 20960, 30848, 31571, 38560, 41920, 63142, 77120, 83840, 126284, 154240, 157855, 252568, 315710, 505136, 631420, 1010272, 1262840, 2020544, 2525680, 4041088, 5051360, 10102720, 20205440]

約数ペア:

[(1, 20205440), (2, 10102720), (4, 5051360), (5, 4041088), (8, 2525680), (10, 2020544), (16, 1262840), (20, 1010272), (32, 631420), (40, 505136), (64, 315710), (80, 252568), (128, 157855), (131, 154240), (160, 126284), (241, 83840), (262, 77120), (320, 63142), (482, 41920), (524, 38560), (640, 31571), (655, 30848), (964, 20960), (1048, 19280), (1205, 16768), (1310, 15424), (1928, 10480), (2096, 9640), (2410, 8384), (2620, 7712), (3856, 5240), (4192, 4820)]