20735840

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^2\times {\mathrm{359}}^1$

素因数の和:412

約数の個数: 72

約数和(自身を含む): 51846480

約数和(自身を除く): 31110640

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 359, 361, 380, 608, 718, 722, 760, 1436, 1444, 1520, 1795, 1805, 2872, 2888, 3040, 3590, 3610, 5744, 5776, 6821, 7180, 7220, 11488, 11552, 13642, 14360, 14440, 27284, 28720, 28880, 34105, 54568, 57440, 57760, 68210, 109136, 129599, 136420, 218272, 259198, 272840, 518396, 545680, 647995, 1036792, 1091360, 1295990, 2073584, 2591980, 4147168, 5183960, 10367920, 20735840]

約数ペア:

[(1, 20735840), (2, 10367920), (4, 5183960), (5, 4147168), (8, 2591980), (10, 2073584), (16, 1295990), (19, 1091360), (20, 1036792), (32, 647995), (38, 545680), (40, 518396), (76, 272840), (80, 259198), (95, 218272), (152, 136420), (160, 129599), (190, 109136), (304, 68210), (359, 57760), (361, 57440), (380, 54568), (608, 34105), (718, 28880), (722, 28720), (760, 27284), (1436, 14440), (1444, 14360), (1520, 13642), (1795, 11552), (1805, 11488), (2872, 7220), (2888, 7180), (3040, 6821), (3590, 5776), (3610, 5744)]