21005344

素因数分解:

$2^5\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{157}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 43120728

約数和(自身を除く): 22115384

約数列:

[1, 2, 4, 8, 16, 32, 37, 74, 113, 148, 157, 226, 296, 314, 452, 592, 628, 904, 1184, 1256, 1808, 2512, 3616, 4181, 5024, 5809, 8362, 11618, 16724, 17741, 23236, 33448, 35482, 46472, 66896, 70964, 92944, 133792, 141928, 185888, 283856, 567712, 656417, 1312834, 2625668, 5251336, 10502672, 21005344]

約数ペア:

[(1, 21005344), (2, 10502672), (4, 5251336), (8, 2625668), (16, 1312834), (32, 656417), (37, 567712), (74, 283856), (113, 185888), (148, 141928), (157, 133792), (226, 92944), (296, 70964), (314, 66896), (452, 46472), (592, 35482), (628, 33448), (904, 23236), (1184, 17741), (1256, 16724), (1808, 11618), (2512, 8362), (3616, 5809), (4181, 5024)]