18782920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{881}}^1$

素因数の和:946

約数の個数: 64

約数和(自身を含む): 46675440

約数和(自身を除く): 27892520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 881, 1066, 1640, 1762, 2132, 2665, 3524, 4264, 4405, 5330, 7048, 8810, 10660, 11453, 17620, 21320, 22906, 35240, 36121, 45812, 57265, 72242, 91624, 114530, 144484, 180605, 229060, 288968, 361210, 458120, 469573, 722420, 939146, 1444840, 1878292, 2347865, 3756584, 4695730, 9391460, 18782920]

約数ペア:

[(1, 18782920), (2, 9391460), (4, 4695730), (5, 3756584), (8, 2347865), (10, 1878292), (13, 1444840), (20, 939146), (26, 722420), (40, 469573), (41, 458120), (52, 361210), (65, 288968), (82, 229060), (104, 180605), (130, 144484), (164, 114530), (205, 91624), (260, 72242), (328, 57265), (410, 45812), (520, 36121), (533, 35240), (820, 22906), (881, 21320), (1066, 17620), (1640, 11453), (1762, 10660), (2132, 8810), (2665, 7048), (3524, 5330), (4264, 4405)]