199948720

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{17981}}^1$

素因数の和:18133

約数の個数: 40

約数和(自身を含む): 468251280

約数和(自身を除く): 268302560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 2224, 2780, 5560, 11120, 17981, 35962, 71924, 89905, 143848, 179810, 287696, 359620, 719240, 1438480, 2499359, 4998718, 9997436, 12496795, 19994872, 24993590, 39989744, 49987180, 99974360, 199948720]

約数ペア:

[(1, 199948720), (2, 99974360), (4, 49987180), (5, 39989744), (8, 24993590), (10, 19994872), (16, 12496795), (20, 9997436), (40, 4998718), (80, 2499359), (139, 1438480), (278, 719240), (556, 359620), (695, 287696), (1112, 179810), (1390, 143848), (2224, 89905), (2780, 71924), (5560, 35962), (11120, 17981)]