257549460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{613213}}^1$

素因数の和:613232

約数の個数: 48

約数和(自身を含む): 824159616

約数和(自身を除く): 566610156

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 613213, 1226426, 1839639, 2452852, 3066065, 3679278, 4292491, 6132130, 7358556, 8584982, 9198195, 12264260, 12877473, 17169964, 18396390, 21462455, 25754946, 36792780, 42924910, 51509892, 64387365, 85849820, 128774730, 257549460]

約数ペア:

[(1, 257549460), (2, 128774730), (3, 85849820), (4, 64387365), (5, 51509892), (6, 42924910), (7, 36792780), (10, 25754946), (12, 21462455), (14, 18396390), (15, 17169964), (20, 12877473), (21, 12264260), (28, 9198195), (30, 8584982), (35, 7358556), (42, 6132130), (60, 4292491), (70, 3679278), (84, 3066065), (105, 2452852), (140, 1839639), (210, 1226426), (420, 613213)]