72981640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{44501}}^1$

素因数の和:44553

約数の個数: 32

約数和(自身を含む): 168217560

約数和(自身を除く): 95235920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 44501, 89002, 178004, 222505, 356008, 445010, 890020, 1780040, 1824541, 3649082, 7298164, 9122705, 14596328, 18245410, 36490820, 72981640]

約数ペア:

[(1, 72981640), (2, 36490820), (4, 18245410), (5, 14596328), (8, 9122705), (10, 7298164), (20, 3649082), (40, 1824541), (41, 1780040), (82, 890020), (164, 445010), (205, 356008), (328, 222505), (410, 178004), (820, 89002), (1640, 44501)]