28940840

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{409}}^1$

素因数の和:510

約数の個数: 64

約数和(自身を含む): 68634000

約数和(自身を除く): 39693160

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 61, 116, 122, 145, 232, 244, 290, 305, 409, 488, 580, 610, 818, 1160, 1220, 1636, 1769, 2045, 2440, 3272, 3538, 4090, 7076, 8180, 8845, 11861, 14152, 16360, 17690, 23722, 24949, 35380, 47444, 49898, 59305, 70760, 94888, 99796, 118610, 124745, 199592, 237220, 249490, 474440, 498980, 723521, 997960, 1447042, 2894084, 3617605, 5788168, 7235210, 14470420, 28940840]

約数ペア:

[(1, 28940840), (2, 14470420), (4, 7235210), (5, 5788168), (8, 3617605), (10, 2894084), (20, 1447042), (29, 997960), (40, 723521), (58, 498980), (61, 474440), (116, 249490), (122, 237220), (145, 199592), (232, 124745), (244, 118610), (290, 99796), (305, 94888), (409, 70760), (488, 59305), (580, 49898), (610, 47444), (818, 35380), (1160, 24949), (1220, 23722), (1636, 17690), (1769, 16360), (2045, 14152), (2440, 11861), (3272, 8845), (3538, 8180), (4090, 7076)]