21475370

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 25180630

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 71, 142, 145, 149, 203, 290, 298, 355, 406, 497, 710, 745, 994, 1015, 1043, 1490, 2030, 2059, 2086, 2485, 4118, 4321, 4970, 5215, 8642, 10295, 10430, 10579, 14413, 20590, 21158, 21605, 28826, 30247, 43210, 52895, 60494, 72065, 74053, 105790, 144130, 148106, 151235, 302470, 306791, 370265, 613582, 740530, 1533955, 2147537, 3067910, 4295074, 10737685, 21475370]

約数ペア:

[(1, 21475370), (2, 10737685), (5, 4295074), (7, 3067910), (10, 2147537), (14, 1533955), (29, 740530), (35, 613582), (58, 370265), (70, 306791), (71, 302470), (142, 151235), (145, 148106), (149, 144130), (203, 105790), (290, 74053), (298, 72065), (355, 60494), (406, 52895), (497, 43210), (710, 30247), (745, 28826), (994, 21605), (1015, 21158), (1043, 20590), (1490, 14413), (2030, 10579), (2059, 10430), (2086, 10295), (2485, 8642), (4118, 5215), (4321, 4970)]