21384640

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3931}}^1$

素因数の和:3965

約数の個数: 56

約数和(自身を含む): 53931312

約数和(自身を除く): 32546672

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, 3931, 5440, 7862, 15724, 19655, 31448, 39310, 62896, 66827, 78620, 125792, 133654, 157240, 251584, 267308, 314480, 334135, 534616, 628960, 668270, 1069232, 1257920, 1336540, 2138464, 2673080, 4276928, 5346160, 10692320, 21384640]

約数ペア:

[(1, 21384640), (2, 10692320), (4, 5346160), (5, 4276928), (8, 2673080), (10, 2138464), (16, 1336540), (17, 1257920), (20, 1069232), (32, 668270), (34, 628960), (40, 534616), (64, 334135), (68, 314480), (80, 267308), (85, 251584), (136, 157240), (160, 133654), (170, 125792), (272, 78620), (320, 66827), (340, 62896), (544, 39310), (680, 31448), (1088, 19655), (1360, 15724), (2720, 7862), (3931, 5440)]