20509060

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 51819264

約数和(自身を除く): 31310204

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 71, 101, 110, 130, 142, 143, 202, 220, 260, 284, 286, 355, 404, 505, 572, 710, 715, 781, 923, 1010, 1111, 1313, 1420, 1430, 1562, 1846, 2020, 2222, 2626, 2860, 3124, 3692, 3905, 4444, 4615, 5252, 5555, 6565, 7171, 7810, 9230, 10153, 11110, 13130, 14342, 14443, 15620, 18460, 20306, 22220, 26260, 28684, 28886, 35855, 40612, 50765, 57772, 71710, 72215, 78881, 93223, 101530, 143420, 144430, 157762, 186446, 203060, 288860, 315524, 372892, 394405, 466115, 788810, 932230, 1025453, 1577620, 1864460, 2050906, 4101812, 5127265, 10254530, 20509060]

約数ペア:

[(1, 20509060), (2, 10254530), (4, 5127265), (5, 4101812), (10, 2050906), (11, 1864460), (13, 1577620), (20, 1025453), (22, 932230), (26, 788810), (44, 466115), (52, 394405), (55, 372892), (65, 315524), (71, 288860), (101, 203060), (110, 186446), (130, 157762), (142, 144430), (143, 143420), (202, 101530), (220, 93223), (260, 78881), (284, 72215), (286, 71710), (355, 57772), (404, 50765), (505, 40612), (572, 35855), (710, 28886), (715, 28684), (781, 26260), (923, 22220), (1010, 20306), (1111, 18460), (1313, 15620), (1420, 14443), (1430, 14342), (1562, 13130), (1846, 11110), (2020, 10153), (2222, 9230), (2626, 7810), (2860, 7171), (3124, 6565), (3692, 5555), (3905, 5252), (4444, 4615)]