81518320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{761}}^1$

素因数の和:890

約数の個数: 80

約数和(自身を含む): 206361792

約数和(自身を除く): 124843472

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 103, 104, 130, 206, 208, 260, 412, 515, 520, 761, 824, 1030, 1040, 1339, 1522, 1648, 2060, 2678, 3044, 3805, 4120, 5356, 6088, 6695, 7610, 8240, 9893, 10712, 12176, 13390, 15220, 19786, 21424, 26780, 30440, 39572, 49465, 53560, 60880, 78383, 79144, 98930, 107120, 156766, 158288, 197860, 313532, 391915, 395720, 627064, 783830, 791440, 1018979, 1254128, 1567660, 2037958, 3135320, 4075916, 5094895, 6270640, 8151832, 10189790, 16303664, 20379580, 40759160, 81518320]

約数ペア:

[(1, 81518320), (2, 40759160), (4, 20379580), (5, 16303664), (8, 10189790), (10, 8151832), (13, 6270640), (16, 5094895), (20, 4075916), (26, 3135320), (40, 2037958), (52, 1567660), (65, 1254128), (80, 1018979), (103, 791440), (104, 783830), (130, 627064), (206, 395720), (208, 391915), (260, 313532), (412, 197860), (515, 158288), (520, 156766), (761, 107120), (824, 98930), (1030, 79144), (1040, 78383), (1339, 60880), (1522, 53560), (1648, 49465), (2060, 39572), (2678, 30440), (3044, 26780), (3805, 21424), (4120, 19786), (5356, 15220), (6088, 13390), (6695, 12176), (7610, 10712), (8240, 9893)]