721000240

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{84229}}^1$

素因数の和:84349

約数の個数: 40

約数和(自身を含む): 1692012240

約数和(自身を除く): 971012000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 4280, 8560, 84229, 168458, 336916, 421145, 673832, 842290, 1347664, 1684580, 3369160, 6738320, 9012503, 18025006, 36050012, 45062515, 72100024, 90125030, 144200048, 180250060, 360500120, 721000240]

約数ペア:

[(1, 721000240), (2, 360500120), (4, 180250060), (5, 144200048), (8, 90125030), (10, 72100024), (16, 45062515), (20, 36050012), (40, 18025006), (80, 9012503), (107, 6738320), (214, 3369160), (428, 1684580), (535, 1347664), (856, 842290), (1070, 673832), (1712, 421145), (2140, 336916), (4280, 168458), (8560, 84229)]