1285288520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{7457}}^1$

素因数の和:7638

約数の個数: 64

約数和(自身を含む): 3007065600

約数和(自身を除く): 1721777080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 139, 155, 248, 278, 310, 556, 620, 695, 1112, 1240, 1390, 2780, 4309, 5560, 7457, 8618, 14914, 17236, 21545, 29828, 34472, 37285, 43090, 59656, 74570, 86180, 149140, 172360, 231167, 298280, 462334, 924668, 1036523, 1155835, 1849336, 2073046, 2311670, 4146092, 4623340, 5182615, 8292184, 9246680, 10365230, 20730460, 32132213, 41460920, 64264426, 128528852, 160661065, 257057704, 321322130, 642644260, 1285288520]

約数ペア:

[(1, 1285288520), (2, 642644260), (4, 321322130), (5, 257057704), (8, 160661065), (10, 128528852), (20, 64264426), (31, 41460920), (40, 32132213), (62, 20730460), (124, 10365230), (139, 9246680), (155, 8292184), (248, 5182615), (278, 4623340), (310, 4146092), (556, 2311670), (620, 2073046), (695, 1849336), (1112, 1155835), (1240, 1036523), (1390, 924668), (2780, 462334), (4309, 298280), (5560, 231167), (7457, 172360), (8618, 149140), (14914, 86180), (17236, 74570), (21545, 59656), (29828, 43090), (34472, 37285)]