721218120

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{7877}}^1$

素因数の和:8007

約数の個数: 128

約数和(自身を含む): 2495750400

約数和(自身を除く): 1774532280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 109, 120, 140, 168, 210, 218, 280, 327, 420, 436, 545, 654, 763, 840, 872, 1090, 1308, 1526, 1635, 2180, 2289, 2616, 3052, 3270, 3815, 4360, 4578, 6104, 6540, 7630, 7877, 9156, 11445, 13080, 15260, 15754, 18312, 22890, 23631, 30520, 31508, 39385, 45780, 47262, 55139, 63016, 78770, 91560, 94524, 110278, 118155, 157540, 165417, 189048, 220556, 236310, 275695, 315080, 330834, 441112, 472620, 551390, 661668, 827085, 858593, 945240, 1102780, 1323336, 1654170, 1717186, 2205560, 2575779, 3308340, 3434372, 4292965, 5151558, 6010151, 6616680, 6868744, 8585930, 10303116, 12020302, 12878895, 17171860, 18030453, 20606232, 24040604, 25757790, 30050755, 34343720, 36060906, 48081208, 51515580, 60101510, 72121812, 90152265, 103031160, 120203020, 144243624, 180304530, 240406040, 360609060, 721218120]

約数ペア:

[(1, 721218120), (2, 360609060), (3, 240406040), (4, 180304530), (5, 144243624), (6, 120203020), (7, 103031160), (8, 90152265), (10, 72121812), (12, 60101510), (14, 51515580), (15, 48081208), (20, 36060906), (21, 34343720), (24, 30050755), (28, 25757790), (30, 24040604), (35, 20606232), (40, 18030453), (42, 17171860), (56, 12878895), (60, 12020302), (70, 10303116), (84, 8585930), (105, 6868744), (109, 6616680), (120, 6010151), (140, 5151558), (168, 4292965), (210, 3434372), (218, 3308340), (280, 2575779), (327, 2205560), (420, 1717186), (436, 1654170), (545, 1323336), (654, 1102780), (763, 945240), (840, 858593), (872, 827085), (1090, 661668), (1308, 551390), (1526, 472620), (1635, 441112), (2180, 330834), (2289, 315080), (2616, 275695), (3052, 236310), (3270, 220556), (3815, 189048), (4360, 165417), (4578, 157540), (6104, 118155), (6540, 110278), (7630, 94524), (7877, 91560), (9156, 78770), (11445, 63016), (13080, 55139), (15260, 47262), (15754, 45780), (18312, 39385), (22890, 31508), (23631, 30520)]