21197804560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{197299}}^1$

素因数の和:197408

約数の個数: 80

約数和(自身を含む): 52844832000

約数和(自身を除く): 31647027440

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 79, 80, 85, 136, 158, 170, 272, 316, 340, 395, 632, 680, 790, 1264, 1343, 1360, 1580, 2686, 3160, 5372, 6320, 6715, 10744, 13430, 21488, 26860, 53720, 107440, 197299, 394598, 789196, 986495, 1578392, 1972990, 3156784, 3354083, 3945980, 6708166, 7891960, 13416332, 15586621, 15783920, 16770415, 26832664, 31173242, 33540830, 53665328, 62346484, 67081660, 77933105, 124692968, 134163320, 155866210, 249385936, 264972557, 268326640, 311732420, 529945114, 623464840, 1059890228, 1246929680, 1324862785, 2119780456, 2649725570, 4239560912, 5299451140, 10598902280, 21197804560]

約数ペア:

[(1, 21197804560), (2, 10598902280), (4, 5299451140), (5, 4239560912), (8, 2649725570), (10, 2119780456), (16, 1324862785), (17, 1246929680), (20, 1059890228), (34, 623464840), (40, 529945114), (68, 311732420), (79, 268326640), (80, 264972557), (85, 249385936), (136, 155866210), (158, 134163320), (170, 124692968), (272, 77933105), (316, 67081660), (340, 62346484), (395, 53665328), (632, 33540830), (680, 31173242), (790, 26832664), (1264, 16770415), (1343, 15783920), (1360, 15586621), (1580, 13416332), (2686, 7891960), (3160, 6708166), (5372, 3945980), (6320, 3354083), (6715, 3156784), (10744, 1972990), (13430, 1578392), (21488, 986495), (26860, 789196), (53720, 394598), (107440, 197299)]