21241360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{457}}^1$

素因数の和:560

約数の個数: 80

約数和(自身を含む): 57246336

約数和(自身を除く): 36004976

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 83, 112, 140, 166, 280, 332, 415, 457, 560, 581, 664, 830, 914, 1162, 1328, 1660, 1828, 2285, 2324, 2905, 3199, 3320, 3656, 4570, 4648, 5810, 6398, 6640, 7312, 9140, 9296, 11620, 12796, 15995, 18280, 23240, 25592, 31990, 36560, 37931, 46480, 51184, 63980, 75862, 127960, 151724, 189655, 255920, 265517, 303448, 379310, 531034, 606896, 758620, 1062068, 1327585, 1517240, 2124136, 2655170, 3034480, 4248272, 5310340, 10620680, 21241360]

約数ペア:

[(1, 21241360), (2, 10620680), (4, 5310340), (5, 4248272), (7, 3034480), (8, 2655170), (10, 2124136), (14, 1517240), (16, 1327585), (20, 1062068), (28, 758620), (35, 606896), (40, 531034), (56, 379310), (70, 303448), (80, 265517), (83, 255920), (112, 189655), (140, 151724), (166, 127960), (280, 75862), (332, 63980), (415, 51184), (457, 46480), (560, 37931), (581, 36560), (664, 31990), (830, 25592), (914, 23240), (1162, 18280), (1328, 15995), (1660, 12796), (1828, 11620), (2285, 9296), (2324, 9140), (2905, 7312), (3199, 6640), (3320, 6398), (3656, 5810), (4570, 4648)]