81939325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 114742656

約数和(自身を除く): 32803331

約数列:

[1, 5, 13, 25, 53, 65, 67, 71, 265, 325, 335, 355, 689, 871, 923, 1325, 1675, 1775, 3445, 3551, 3763, 4355, 4615, 4757, 17225, 17755, 18815, 21775, 23075, 23785, 46163, 48919, 61841, 88775, 94075, 118925, 230815, 244595, 252121, 309205, 1154075, 1222975, 1260605, 1546025, 3277573, 6303025, 16387865, 81939325]

約数ペア:

[(1, 81939325), (5, 16387865), (13, 6303025), (25, 3277573), (53, 1546025), (65, 1260605), (67, 1222975), (71, 1154075), (265, 309205), (325, 252121), (335, 244595), (355, 230815), (689, 118925), (871, 94075), (923, 88775), (1325, 61841), (1675, 48919), (1775, 46163), (3445, 23785), (3551, 23075), (3763, 21775), (4355, 18815), (4615, 17755), (4757, 17225)]