21621880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:149

約数の個数: 128

約数和(自身を含む): 59719680

約数和(自身を除く): 38097800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 47, 53, 56, 62, 70, 94, 106, 124, 140, 155, 188, 212, 217, 235, 248, 265, 280, 310, 329, 371, 376, 424, 434, 470, 530, 620, 658, 742, 868, 940, 1060, 1085, 1240, 1316, 1457, 1484, 1643, 1645, 1736, 1855, 1880, 2120, 2170, 2491, 2632, 2914, 2968, 3286, 3290, 3710, 4340, 4982, 5828, 6572, 6580, 7285, 7420, 8215, 8680, 9964, 10199, 11501, 11656, 12455, 13144, 13160, 14570, 14840, 16430, 17437, 19928, 20398, 23002, 24910, 29140, 32860, 34874, 40796, 46004, 49820, 50995, 57505, 58280, 65720, 69748, 77221, 81592, 87185, 92008, 99640, 101990, 115010, 139496, 154442, 174370, 203980, 230020, 308884, 348740, 386105, 407960, 460040, 540547, 617768, 697480, 772210, 1081094, 1544420, 2162188, 2702735, 3088840, 4324376, 5405470, 10810940, 21621880]

約数ペア:

[(1, 21621880), (2, 10810940), (4, 5405470), (5, 4324376), (7, 3088840), (8, 2702735), (10, 2162188), (14, 1544420), (20, 1081094), (28, 772210), (31, 697480), (35, 617768), (40, 540547), (47, 460040), (53, 407960), (56, 386105), (62, 348740), (70, 308884), (94, 230020), (106, 203980), (124, 174370), (140, 154442), (155, 139496), (188, 115010), (212, 101990), (217, 99640), (235, 92008), (248, 87185), (265, 81592), (280, 77221), (310, 69748), (329, 65720), (371, 58280), (376, 57505), (424, 50995), (434, 49820), (470, 46004), (530, 40796), (620, 34874), (658, 32860), (742, 29140), (868, 24910), (940, 23002), (1060, 20398), (1085, 19928), (1240, 17437), (1316, 16430), (1457, 14840), (1484, 14570), (1643, 13160), (1645, 13144), (1736, 12455), (1855, 11656), (1880, 11501), (2120, 10199), (2170, 9964), (2491, 8680), (2632, 8215), (2914, 7420), (2968, 7285), (3286, 6580), (3290, 6572), (3710, 5828), (4340, 4982)]