20953520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:139

約数の個数: 160

約数和(自身を含む): 61710336

約数和(自身を除く): 40756816

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 31, 34, 35, 40, 56, 62, 68, 70, 71, 80, 85, 112, 119, 124, 136, 140, 142, 155, 170, 217, 238, 248, 272, 280, 284, 310, 340, 355, 434, 476, 496, 497, 527, 560, 568, 595, 620, 680, 710, 868, 952, 994, 1054, 1085, 1136, 1190, 1207, 1240, 1360, 1420, 1736, 1904, 1988, 2108, 2170, 2201, 2380, 2414, 2480, 2485, 2635, 2840, 3472, 3689, 3976, 4216, 4340, 4402, 4760, 4828, 4970, 5270, 5680, 6035, 7378, 7952, 8432, 8449, 8680, 8804, 9520, 9656, 9940, 10540, 11005, 12070, 14756, 15407, 16898, 17360, 17608, 18445, 19312, 19880, 21080, 22010, 24140, 29512, 30814, 33796, 35216, 36890, 37417, 39760, 42160, 42245, 44020, 48280, 59024, 61628, 67592, 73780, 74834, 77035, 84490, 88040, 96560, 123256, 135184, 147560, 149668, 154070, 168980, 176080, 187085, 246512, 261919, 295120, 299336, 308140, 337960, 374170, 523838, 598672, 616280, 675920, 748340, 1047676, 1232560, 1309595, 1496680, 2095352, 2619190, 2993360, 4190704, 5238380, 10476760, 20953520]

約数ペア:

[(1, 20953520), (2, 10476760), (4, 5238380), (5, 4190704), (7, 2993360), (8, 2619190), (10, 2095352), (14, 1496680), (16, 1309595), (17, 1232560), (20, 1047676), (28, 748340), (31, 675920), (34, 616280), (35, 598672), (40, 523838), (56, 374170), (62, 337960), (68, 308140), (70, 299336), (71, 295120), (80, 261919), (85, 246512), (112, 187085), (119, 176080), (124, 168980), (136, 154070), (140, 149668), (142, 147560), (155, 135184), (170, 123256), (217, 96560), (238, 88040), (248, 84490), (272, 77035), (280, 74834), (284, 73780), (310, 67592), (340, 61628), (355, 59024), (434, 48280), (476, 44020), (496, 42245), (497, 42160), (527, 39760), (560, 37417), (568, 36890), (595, 35216), (620, 33796), (680, 30814), (710, 29512), (868, 24140), (952, 22010), (994, 21080), (1054, 19880), (1085, 19312), (1136, 18445), (1190, 17608), (1207, 17360), (1240, 16898), (1360, 15407), (1420, 14756), (1736, 12070), (1904, 11005), (1988, 10540), (2108, 9940), (2170, 9656), (2201, 9520), (2380, 8804), (2414, 8680), (2480, 8449), (2485, 8432), (2635, 7952), (2840, 7378), (3472, 6035), (3689, 5680), (3976, 5270), (4216, 4970), (4340, 4828), (4402, 4760)]