21617375

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{251}}^1$

素因数の和:332

約数の個数: 32

約数和(自身を含む): 29719872

約数和(自身を除く): 8102497

約数列:

[1, 5, 13, 25, 53, 65, 125, 251, 265, 325, 689, 1255, 1325, 1625, 3263, 3445, 6275, 6625, 13303, 16315, 17225, 31375, 66515, 81575, 86125, 172939, 332575, 407875, 864695, 1662875, 4323475, 21617375]

約数ペア:

[(1, 21617375), (5, 4323475), (13, 1662875), (25, 864695), (53, 407875), (65, 332575), (125, 172939), (251, 86125), (265, 81575), (325, 66515), (689, 31375), (1255, 17225), (1325, 16315), (1625, 13303), (3263, 6625), (3445, 6275)]