17777764820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{353}}^1\times {\mathrm{61417}}^1$

素因数の和:61820

約数の個数: 48

約数和(自身を含む): 38352838608

約数和(自身を除く): 20575073788

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 353, 410, 706, 820, 1412, 1765, 3530, 7060, 14473, 28946, 57892, 61417, 72365, 122834, 144730, 245668, 289460, 307085, 614170, 1228340, 2518097, 5036194, 10072388, 12590485, 21680201, 25180970, 43360402, 50361940, 86720804, 108401005, 216802010, 433604020, 888888241, 1777776482, 3555552964, 4444441205, 8888882410, 17777764820]

約数ペア:

[(1, 17777764820), (2, 8888882410), (4, 4444441205), (5, 3555552964), (10, 1777776482), (20, 888888241), (41, 433604020), (82, 216802010), (164, 108401005), (205, 86720804), (353, 50361940), (410, 43360402), (706, 25180970), (820, 21680201), (1412, 12590485), (1765, 10072388), (3530, 5036194), (7060, 2518097), (14473, 1228340), (28946, 614170), (57892, 307085), (61417, 289460), (72365, 245668), (122834, 144730)]