21079984

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{181}}^1\times {\mathrm{251}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 42653520

約数和(自身を除く): 21573536

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 181, 232, 251, 362, 464, 502, 724, 1004, 1448, 2008, 2896, 4016, 5249, 7279, 10498, 14558, 20996, 29116, 41992, 45431, 58232, 83984, 90862, 116464, 181724, 363448, 726896, 1317499, 2634998, 5269996, 10539992, 21079984]

約数ペア:

[(1, 21079984), (2, 10539992), (4, 5269996), (8, 2634998), (16, 1317499), (29, 726896), (58, 363448), (116, 181724), (181, 116464), (232, 90862), (251, 83984), (362, 58232), (464, 45431), (502, 41992), (724, 29116), (1004, 20996), (1448, 14558), (2008, 10498), (2896, 7279), (4016, 5249)]