840804920

素因数分解:

$2^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{191}}^1\times {\mathrm{659}}^1$

素因数の和:1028

約数の個数: 64

約数和(自身を含む): 1916006400

約数和(自身を除く): 1075201480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 167, 191, 334, 382, 659, 668, 764, 835, 955, 1318, 1336, 1528, 1670, 1910, 2636, 3295, 3340, 3820, 5272, 6590, 6680, 7640, 13180, 26360, 31897, 63794, 110053, 125869, 127588, 159485, 220106, 251738, 255176, 318970, 440212, 503476, 550265, 629345, 637940, 880424, 1006952, 1100530, 1258690, 1275880, 2201060, 2517380, 4402120, 5034760, 21020123, 42040246, 84080492, 105100615, 168160984, 210201230, 420402460, 840804920]

約数ペア:

[(1, 840804920), (2, 420402460), (4, 210201230), (5, 168160984), (8, 105100615), (10, 84080492), (20, 42040246), (40, 21020123), (167, 5034760), (191, 4402120), (334, 2517380), (382, 2201060), (659, 1275880), (668, 1258690), (764, 1100530), (835, 1006952), (955, 880424), (1318, 637940), (1336, 629345), (1528, 550265), (1670, 503476), (1910, 440212), (2636, 318970), (3295, 255176), (3340, 251738), (3820, 220106), (5272, 159485), (6590, 127588), (6680, 125869), (7640, 110053), (13180, 63794), (26360, 31897)]