21246160

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{659}}^1$

素因数の和:716

約数の個数: 80

約数和(自身を含む): 54996480

約数和(自身を除く): 33750320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 659, 806, 1040, 1240, 1318, 1612, 2015, 2480, 2636, 3224, 3295, 4030, 5272, 6448, 6590, 8060, 8567, 10544, 13180, 16120, 17134, 20429, 26360, 32240, 34268, 40858, 42835, 52720, 68536, 81716, 85670, 102145, 137072, 163432, 171340, 204290, 265577, 326864, 342680, 408580, 531154, 685360, 817160, 1062308, 1327885, 1634320, 2124616, 2655770, 4249232, 5311540, 10623080, 21246160]

約数ペア:

[(1, 21246160), (2, 10623080), (4, 5311540), (5, 4249232), (8, 2655770), (10, 2124616), (13, 1634320), (16, 1327885), (20, 1062308), (26, 817160), (31, 685360), (40, 531154), (52, 408580), (62, 342680), (65, 326864), (80, 265577), (104, 204290), (124, 171340), (130, 163432), (155, 137072), (208, 102145), (248, 85670), (260, 81716), (310, 68536), (403, 52720), (496, 42835), (520, 40858), (620, 34268), (659, 32240), (806, 26360), (1040, 20429), (1240, 17134), (1318, 16120), (1612, 13180), (2015, 10544), (2480, 8567), (2636, 8060), (3224, 6590), (3295, 6448), (4030, 5272)]