21080272

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4079}}^1$

素因数の和:4123

約数の個数: 40

約数和(自身を含む): 45532800

約数和(自身を除く): 24452528

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 272, 304, 323, 646, 1292, 2584, 4079, 5168, 8158, 16316, 32632, 65264, 69343, 77501, 138686, 155002, 277372, 310004, 554744, 620008, 1109488, 1240016, 1317517, 2635034, 5270068, 10540136, 21080272]

約数ペア:

[(1, 21080272), (2, 10540136), (4, 5270068), (8, 2635034), (16, 1317517), (17, 1240016), (19, 1109488), (34, 620008), (38, 554744), (68, 310004), (76, 277372), (136, 155002), (152, 138686), (272, 77501), (304, 69343), (323, 65264), (646, 32632), (1292, 16316), (2584, 8158), (4079, 5168)]