81812875

素因数分解:

$5^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:580

約数の個数: 32

約数和(自身を含む): 108066816

約数和(自身を除く): 26253941

約数列:

[1, 5, 25, 31, 43, 125, 155, 215, 491, 775, 1075, 1333, 2455, 3875, 5375, 6665, 12275, 15221, 21113, 33325, 61375, 76105, 105565, 166625, 380525, 527825, 654503, 1902625, 2639125, 3272515, 16362575, 81812875]

約数ペア:

[(1, 81812875), (5, 16362575), (25, 3272515), (31, 2639125), (43, 1902625), (125, 654503), (155, 527825), (215, 380525), (491, 166625), (775, 105565), (1075, 76105), (1333, 61375), (2455, 33325), (3875, 21113), (5375, 15221), (6665, 12275)]