21471680

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3947}}^1$

素因数の和:3981

約数の個数: 56

約数和(自身を含む): 54150768

約数和(自身を除く): 32679088

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3947, 5440, 7894, 15788, 19735, 31576, 39470, 63152, 67099, 78940, 126304, 134198, 157880, 252608, 268396, 315760, 335495, 536792, 631520, 670990, 1073584, 1263040, 1341980, 2147168, 2683960, 4294336, 5367920, 10735840, 21471680]

約数ペア:

[(1, 21471680), (2, 10735840), (4, 5367920), (5, 4294336), (8, 2683960), (10, 2147168), (16, 1341980), (17, 1263040), (20, 1073584), (32, 670990), (34, 631520), (40, 536792), (64, 335495), (68, 315760), (80, 268396), (85, 252608), (136, 157880), (160, 134198), (170, 126304), (272, 78940), (320, 67099), (340, 63152), (544, 39470), (680, 31576), (1088, 19735), (1360, 15788), (2720, 7894), (3947, 5440)]