666250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:76

約数の個数: 40

約数和(自身を含む): 1377684

約数和(自身を除く): 711434

約数列:

[1, 2, 5, 10, 13, 25, 26, 41, 50, 65, 82, 125, 130, 205, 250, 325, 410, 533, 625, 650, 1025, 1066, 1250, 1625, 2050, 2665, 3250, 5125, 5330, 8125, 10250, 13325, 16250, 25625, 26650, 51250, 66625, 133250, 333125, 666250]

約数ペア:

[(1, 666250), (2, 333125), (5, 133250), (10, 66625), (13, 51250), (25, 26650), (26, 25625), (41, 16250), (50, 13325), (65, 10250), (82, 8125), (125, 5330), (130, 5125), (205, 3250), (250, 2665), (325, 2050), (410, 1625), (533, 1250), (625, 1066), (650, 1025)]