20369960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{911}}^1$

素因数の和:978

約数の個数: 64

約数和(自身を含む): 50561280

約数和(自身を除く): 30191320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 911, 1118, 1720, 1822, 2236, 2795, 3644, 4472, 4555, 5590, 7288, 9110, 11180, 11843, 18220, 22360, 23686, 36440, 39173, 47372, 59215, 78346, 94744, 118430, 156692, 195865, 236860, 313384, 391730, 473720, 509249, 783460, 1018498, 1566920, 2036996, 2546245, 4073992, 5092490, 10184980, 20369960]

約数ペア:

[(1, 20369960), (2, 10184980), (4, 5092490), (5, 4073992), (8, 2546245), (10, 2036996), (13, 1566920), (20, 1018498), (26, 783460), (40, 509249), (43, 473720), (52, 391730), (65, 313384), (86, 236860), (104, 195865), (130, 156692), (172, 118430), (215, 94744), (260, 78346), (344, 59215), (430, 47372), (520, 39173), (559, 36440), (860, 23686), (911, 22360), (1118, 18220), (1720, 11843), (1822, 11180), (2236, 9110), (2795, 7288), (3644, 5590), (4472, 4555)]