261816880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{4127}}^1$

素因数の和:4214

約数の個数: 80

約数和(自身を含む): 666457344

約数和(自身を除く): 404640464

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 61, 65, 80, 104, 122, 130, 208, 244, 260, 305, 488, 520, 610, 793, 976, 1040, 1220, 1586, 2440, 3172, 3965, 4127, 4880, 6344, 7930, 8254, 12688, 15860, 16508, 20635, 31720, 33016, 41270, 53651, 63440, 66032, 82540, 107302, 165080, 214604, 251747, 268255, 330160, 429208, 503494, 536510, 858416, 1006988, 1073020, 1258735, 2013976, 2146040, 2517470, 3272711, 4027952, 4292080, 5034940, 6545422, 10069880, 13090844, 16363555, 20139760, 26181688, 32727110, 52363376, 65454220, 130908440, 261816880]

約数ペア:

[(1, 261816880), (2, 130908440), (4, 65454220), (5, 52363376), (8, 32727110), (10, 26181688), (13, 20139760), (16, 16363555), (20, 13090844), (26, 10069880), (40, 6545422), (52, 5034940), (61, 4292080), (65, 4027952), (80, 3272711), (104, 2517470), (122, 2146040), (130, 2013976), (208, 1258735), (244, 1073020), (260, 1006988), (305, 858416), (488, 536510), (520, 503494), (610, 429208), (793, 330160), (976, 268255), (1040, 251747), (1220, 214604), (1586, 165080), (2440, 107302), (3172, 82540), (3965, 66032), (4127, 63440), (4880, 53651), (6344, 41270), (7930, 33016), (8254, 31720), (12688, 20635), (15860, 16508)]