861250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1$

素因数の和:88

約数の個数: 40

約数和(自身を含む): 1771308

約数和(自身を除く): 910058

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 53, 65, 106, 125, 130, 250, 265, 325, 530, 625, 650, 689, 1250, 1325, 1378, 1625, 2650, 3250, 3445, 6625, 6890, 8125, 13250, 16250, 17225, 33125, 34450, 66250, 86125, 172250, 430625, 861250]

約数ペア:

[(1, 861250), (2, 430625), (5, 172250), (10, 86125), (13, 66250), (25, 34450), (26, 33125), (50, 17225), (53, 16250), (65, 13250), (106, 8125), (125, 6890), (130, 6625), (250, 3445), (265, 3250), (325, 2650), (530, 1625), (625, 1378), (650, 1325), (689, 1250)]