639913985

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{191}}^1$

素因数の和:473

約数の個数: 32

約数和(自身を含む): 799967232

約数和(自身を除く): 160053247

約数列:

[1, 5, 67, 73, 137, 191, 335, 365, 685, 955, 4891, 9179, 10001, 12797, 13943, 24455, 26167, 45895, 50005, 63985, 69715, 130835, 670067, 934181, 1753189, 1910191, 3350335, 4670905, 8765945, 9550955, 127982797, 639913985]

約数ペア:

[(1, 639913985), (5, 127982797), (67, 9550955), (73, 8765945), (137, 4670905), (191, 3350335), (335, 1910191), (365, 1753189), (685, 934181), (955, 670067), (4891, 130835), (9179, 69715), (10001, 63985), (12797, 50005), (13943, 45895), (24455, 26167)]