281382020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^2\times {\mathrm{199}}^1$

素因数の和:349

約数の個数: 72

約数和(自身を含む): 635544000

約数和(自身を除く): 354161980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 199, 244, 305, 380, 398, 610, 796, 995, 1159, 1220, 1990, 2318, 3721, 3781, 3980, 4636, 5795, 7442, 7562, 11590, 12139, 14884, 15124, 18605, 18905, 23180, 24278, 37210, 37810, 48556, 60695, 70699, 74420, 75620, 121390, 141398, 230641, 242780, 282796, 353495, 461282, 706990, 740479, 922564, 1153205, 1413980, 1480958, 2306410, 2961916, 3702395, 4612820, 7404790, 14069101, 14809580, 28138202, 56276404, 70345505, 140691010, 281382020]

約数ペア:

[(1, 281382020), (2, 140691010), (4, 70345505), (5, 56276404), (10, 28138202), (19, 14809580), (20, 14069101), (38, 7404790), (61, 4612820), (76, 3702395), (95, 2961916), (122, 2306410), (190, 1480958), (199, 1413980), (244, 1153205), (305, 922564), (380, 740479), (398, 706990), (610, 461282), (796, 353495), (995, 282796), (1159, 242780), (1220, 230641), (1990, 141398), (2318, 121390), (3721, 75620), (3781, 74420), (3980, 70699), (4636, 60695), (5795, 48556), (7442, 37810), (7562, 37210), (11590, 24278), (12139, 23180), (14884, 18905), (15124, 18605)]