21141965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1$

素因数の和:126

約数の個数: 48

約数和(自身を含む): 31107888

約数和(自身を除く): 9965923

約数列:

[1, 5, 13, 17, 19, 53, 65, 85, 95, 221, 247, 265, 323, 361, 689, 901, 1007, 1105, 1235, 1615, 1805, 3445, 4199, 4505, 4693, 5035, 6137, 11713, 13091, 17119, 19133, 20995, 23465, 30685, 58565, 65455, 79781, 85595, 95665, 222547, 248729, 325261, 398905, 1112735, 1243645, 1626305, 4228393, 21141965]

約数ペア:

[(1, 21141965), (5, 4228393), (13, 1626305), (17, 1243645), (19, 1112735), (53, 398905), (65, 325261), (85, 248729), (95, 222547), (221, 95665), (247, 85595), (265, 79781), (323, 65455), (361, 58565), (689, 30685), (901, 23465), (1007, 20995), (1105, 19133), (1235, 17119), (1615, 13091), (1805, 11713), (3445, 6137), (4199, 5035), (4505, 4693)]