20997340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:251

約数の個数: 96

約数和(自身を含む): 55319040

約数和(自身を除く): 34321700

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 83, 91, 130, 139, 140, 166, 182, 260, 278, 332, 364, 415, 455, 556, 581, 695, 830, 910, 973, 1079, 1162, 1390, 1660, 1807, 1820, 1946, 2158, 2324, 2780, 2905, 3614, 3892, 4316, 4865, 5395, 5810, 7228, 7553, 9035, 9730, 10790, 11537, 11620, 12649, 15106, 18070, 19460, 21580, 23074, 25298, 30212, 36140, 37765, 46148, 50596, 57685, 63245, 75530, 80759, 115370, 126490, 149981, 151060, 161518, 230740, 252980, 299962, 323036, 403795, 599924, 749905, 807590, 1049867, 1499810, 1615180, 2099734, 2999620, 4199468, 5249335, 10498670, 20997340]

約数ペア:

[(1, 20997340), (2, 10498670), (4, 5249335), (5, 4199468), (7, 2999620), (10, 2099734), (13, 1615180), (14, 1499810), (20, 1049867), (26, 807590), (28, 749905), (35, 599924), (52, 403795), (65, 323036), (70, 299962), (83, 252980), (91, 230740), (130, 161518), (139, 151060), (140, 149981), (166, 126490), (182, 115370), (260, 80759), (278, 75530), (332, 63245), (364, 57685), (415, 50596), (455, 46148), (556, 37765), (581, 36140), (695, 30212), (830, 25298), (910, 23074), (973, 21580), (1079, 19460), (1162, 18070), (1390, 15106), (1660, 12649), (1807, 11620), (1820, 11537), (1946, 10790), (2158, 9730), (2324, 9035), (2780, 7553), (2905, 7228), (3614, 5810), (3892, 5395), (4316, 4865)]