20131718680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{345431}}^1$

素因数の和:345520

約数の個数: 64

約数和(自身を含む): 47752519680

約数和(自身を除く): 27620801000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 47, 62, 94, 124, 155, 188, 235, 248, 310, 376, 470, 620, 940, 1240, 1457, 1880, 2914, 5828, 7285, 11656, 14570, 29140, 58280, 345431, 690862, 1381724, 1727155, 2763448, 3454310, 6908620, 10708361, 13817240, 16235257, 21416722, 32470514, 42833444, 53541805, 64941028, 81176285, 85666888, 107083610, 129882056, 162352570, 214167220, 324705140, 428334440, 503292967, 649410280, 1006585934, 2013171868, 2516464835, 4026343736, 5032929670, 10065859340, 20131718680]

約数ペア:

[(1, 20131718680), (2, 10065859340), (4, 5032929670), (5, 4026343736), (8, 2516464835), (10, 2013171868), (20, 1006585934), (31, 649410280), (40, 503292967), (47, 428334440), (62, 324705140), (94, 214167220), (124, 162352570), (155, 129882056), (188, 107083610), (235, 85666888), (248, 81176285), (310, 64941028), (376, 53541805), (470, 42833444), (620, 32470514), (940, 21416722), (1240, 16235257), (1457, 13817240), (1880, 10708361), (2914, 6908620), (5828, 3454310), (7285, 2763448), (11656, 1727155), (14570, 1381724), (29140, 690862), (58280, 345431)]