21124922

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 42336000

約数和(自身を除く): 21211078

約数列:

[1, 2, 7, 13, 14, 19, 26, 38, 41, 82, 91, 133, 149, 182, 247, 266, 287, 298, 494, 533, 574, 779, 1043, 1066, 1558, 1729, 1937, 2086, 2831, 3458, 3731, 3874, 5453, 5662, 6109, 7462, 10127, 10906, 12218, 13559, 19817, 20254, 27118, 36803, 39634, 42763, 70889, 73606, 79417, 85526, 116071, 141778, 158834, 232142, 257621, 515242, 555919, 812497, 1111838, 1508923, 1624994, 3017846, 10562461, 21124922]

約数ペア:

[(1, 21124922), (2, 10562461), (7, 3017846), (13, 1624994), (14, 1508923), (19, 1111838), (26, 812497), (38, 555919), (41, 515242), (82, 257621), (91, 232142), (133, 158834), (149, 141778), (182, 116071), (247, 85526), (266, 79417), (287, 73606), (298, 70889), (494, 42763), (533, 39634), (574, 36803), (779, 27118), (1043, 20254), (1066, 19817), (1558, 13559), (1729, 12218), (1937, 10906), (2086, 10127), (2831, 7462), (3458, 6109), (3731, 5662), (3874, 5453)]