20941280

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7699}}^1$

素因数の和:7731

約数の個数: 48

約数和(自身を含む): 52390800

約数和(自身を除く): 31449520

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7699, 15398, 30796, 38495, 61592, 76990, 123184, 130883, 153980, 246368, 261766, 307960, 523532, 615920, 654415, 1047064, 1231840, 1308830, 2094128, 2617660, 4188256, 5235320, 10470640, 20941280]

約数ペア:

[(1, 20941280), (2, 10470640), (4, 5235320), (5, 4188256), (8, 2617660), (10, 2094128), (16, 1308830), (17, 1231840), (20, 1047064), (32, 654415), (34, 615920), (40, 523532), (68, 307960), (80, 261766), (85, 246368), (136, 153980), (160, 130883), (170, 123184), (272, 76990), (340, 61592), (544, 38495), (680, 30796), (1360, 15398), (2720, 7699)]