20991012

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1231}}^1$

素因数の和:1281

約数の個数: 72

約数和(自身を含む): 58988160

約数和(自身を除く): 37997148

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 29, 42, 49, 58, 84, 87, 98, 116, 147, 174, 196, 203, 294, 348, 406, 588, 609, 812, 1218, 1231, 1421, 2436, 2462, 2842, 3693, 4263, 4924, 5684, 7386, 8526, 8617, 14772, 17052, 17234, 25851, 34468, 35699, 51702, 60319, 71398, 103404, 107097, 120638, 142796, 180957, 214194, 241276, 249893, 361914, 428388, 499786, 723828, 749679, 999572, 1499358, 1749251, 2998716, 3498502, 5247753, 6997004, 10495506, 20991012]

約数ペア:

[(1, 20991012), (2, 10495506), (3, 6997004), (4, 5247753), (6, 3498502), (7, 2998716), (12, 1749251), (14, 1499358), (21, 999572), (28, 749679), (29, 723828), (42, 499786), (49, 428388), (58, 361914), (84, 249893), (87, 241276), (98, 214194), (116, 180957), (147, 142796), (174, 120638), (196, 107097), (203, 103404), (294, 71398), (348, 60319), (406, 51702), (588, 35699), (609, 34468), (812, 25851), (1218, 17234), (1231, 17052), (1421, 14772), (2436, 8617), (2462, 8526), (2842, 7386), (3693, 5684), (4263, 4924)]