21181472

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{863}}^1$

素因数の和:945

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24541408

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 59, 104, 118, 208, 236, 416, 472, 767, 863, 944, 1534, 1726, 1888, 3068, 3452, 6136, 6904, 11219, 12272, 13808, 22438, 24544, 27616, 44876, 50917, 89752, 101834, 179504, 203668, 359008, 407336, 661921, 814672, 1323842, 1629344, 2647684, 5295368, 10590736, 21181472]

約数ペア:

[(1, 21181472), (2, 10590736), (4, 5295368), (8, 2647684), (13, 1629344), (16, 1323842), (26, 814672), (32, 661921), (52, 407336), (59, 359008), (104, 203668), (118, 179504), (208, 101834), (236, 89752), (416, 50917), (472, 44876), (767, 27616), (863, 24544), (944, 22438), (1534, 13808), (1726, 12272), (1888, 11219), (3068, 6904), (3452, 6136)]