21558705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:230

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 20466255

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 69, 79, 105, 113, 115, 161, 237, 339, 345, 395, 483, 553, 565, 791, 805, 1185, 1659, 1695, 1817, 2373, 2415, 2599, 2765, 3955, 5451, 7797, 8295, 8927, 9085, 11865, 12719, 12995, 18193, 26781, 27255, 38157, 38985, 44635, 54579, 62489, 63595, 90965, 133905, 187467, 190785, 205321, 272895, 312445, 615963, 937335, 1026605, 1437247, 3079815, 4311741, 7186235, 21558705]

約数ペア:

[(1, 21558705), (3, 7186235), (5, 4311741), (7, 3079815), (15, 1437247), (21, 1026605), (23, 937335), (35, 615963), (69, 312445), (79, 272895), (105, 205321), (113, 190785), (115, 187467), (161, 133905), (237, 90965), (339, 63595), (345, 62489), (395, 54579), (483, 44635), (553, 38985), (565, 38157), (791, 27255), (805, 26781), (1185, 18193), (1659, 12995), (1695, 12719), (1817, 11865), (2373, 9085), (2415, 8927), (2599, 8295), (2765, 7797), (3955, 5451)]