257460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{613}}^1$

素因数の和:632

約数の個数: 48

約数和(自身を含む): 825216

約数和(自身を除く): 567756

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, 613, 1226, 1839, 2452, 3065, 3678, 4291, 6130, 7356, 8582, 9195, 12260, 12873, 17164, 18390, 21455, 25746, 36780, 42910, 51492, 64365, 85820, 128730, 257460]

約数ペア:

[(1, 257460), (2, 128730), (3, 85820), (4, 64365), (5, 51492), (6, 42910), (7, 36780), (10, 25746), (12, 21455), (14, 18390), (15, 17164), (20, 12873), (21, 12260), (28, 9195), (30, 8582), (35, 7356), (42, 6130), (60, 4291), (70, 3678), (84, 3065), (105, 2452), (140, 1839), (210, 1226), (420, 613)]