31131880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:203

約数の個数: 128

約数和(自身を含む): 83462400

約数和(自身を除く): 52330520

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 23, 26, 38, 40, 46, 52, 65, 76, 92, 95, 104, 115, 130, 137, 152, 184, 190, 230, 247, 260, 274, 299, 380, 437, 460, 494, 520, 548, 598, 685, 760, 874, 920, 988, 1096, 1196, 1235, 1370, 1495, 1748, 1781, 1976, 2185, 2392, 2470, 2603, 2740, 2990, 3151, 3496, 3562, 4370, 4940, 5206, 5480, 5681, 5980, 6302, 7124, 8740, 8905, 9880, 10412, 11362, 11960, 12604, 13015, 14248, 15755, 17480, 17810, 20824, 22724, 25208, 26030, 28405, 31510, 33839, 35620, 40963, 45448, 52060, 56810, 59869, 63020, 67678, 71240, 81926, 104120, 113620, 119738, 126040, 135356, 163852, 169195, 204815, 227240, 239476, 270712, 299345, 327704, 338390, 409630, 478952, 598690, 676780, 778297, 819260, 1197380, 1353560, 1556594, 1638520, 2394760, 3113188, 3891485, 6226376, 7782970, 15565940, 31131880]

約数ペア:

[(1, 31131880), (2, 15565940), (4, 7782970), (5, 6226376), (8, 3891485), (10, 3113188), (13, 2394760), (19, 1638520), (20, 1556594), (23, 1353560), (26, 1197380), (38, 819260), (40, 778297), (46, 676780), (52, 598690), (65, 478952), (76, 409630), (92, 338390), (95, 327704), (104, 299345), (115, 270712), (130, 239476), (137, 227240), (152, 204815), (184, 169195), (190, 163852), (230, 135356), (247, 126040), (260, 119738), (274, 113620), (299, 104120), (380, 81926), (437, 71240), (460, 67678), (494, 63020), (520, 59869), (548, 56810), (598, 52060), (685, 45448), (760, 40963), (874, 35620), (920, 33839), (988, 31510), (1096, 28405), (1196, 26030), (1235, 25208), (1370, 22724), (1495, 20824), (1748, 17810), (1781, 17480), (1976, 15755), (2185, 14248), (2392, 13015), (2470, 12604), (2603, 11960), (2740, 11362), (2990, 10412), (3151, 9880), (3496, 8905), (3562, 8740), (4370, 7124), (4940, 6302), (5206, 5980), (5480, 5681)]