21349640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41057}}^1$

素因数の和:41081

約数の個数: 32

約数和(自身を含む): 51733080

約数和(自身を除く): 30383440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41057, 82114, 164228, 205285, 328456, 410570, 533741, 821140, 1067482, 1642280, 2134964, 2668705, 4269928, 5337410, 10674820, 21349640]

約数ペア:

[(1, 21349640), (2, 10674820), (4, 5337410), (5, 4269928), (8, 2668705), (10, 2134964), (13, 1642280), (20, 1067482), (26, 821140), (40, 533741), (52, 410570), (65, 328456), (104, 205285), (130, 164228), (260, 82114), (520, 41057)]