1639540

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{239}}^1$

素因数の和:269

約数の個数: 48

約数和(自身を含む): 4032000

約数和(自身を除く): 2392460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 239, 245, 343, 478, 490, 686, 956, 980, 1195, 1372, 1673, 1715, 2390, 3346, 3430, 4780, 6692, 6860, 8365, 11711, 16730, 23422, 33460, 46844, 58555, 81977, 117110, 163954, 234220, 327908, 409885, 819770, 1639540]

約数ペア:

[(1, 1639540), (2, 819770), (4, 409885), (5, 327908), (7, 234220), (10, 163954), (14, 117110), (20, 81977), (28, 58555), (35, 46844), (49, 33460), (70, 23422), (98, 16730), (140, 11711), (196, 8365), (239, 6860), (245, 6692), (343, 4780), (478, 3430), (490, 3346), (686, 2390), (956, 1715), (980, 1673), (1195, 1372)]