18815692780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{4079}}^1$

素因数の和:4367

約数の個数: 96

約数和(自身を含む): 42497280000

約数和(自身を除く): 23681587220

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, 3781, 3980, 4079, 4636, 5795, 7562, 8158, 11590, 12139, 15124, 16316, 18905, 20395, 23180, 24278, 37810, 40790, 48556, 60695, 75620, 77501, 81580, 121390, 155002, 230641, 242780, 248819, 310004, 387505, 461282, 497638, 775010, 811721, 922564, 995276, 1153205, 1244095, 1550020, 1623442, 2306410, 2488190, 3246884, 4058605, 4612820, 4727561, 4976380, 8117210, 9455122, 15422699, 16234420, 18910244, 23637805, 30845398, 47275610, 49514981, 61690796, 77113495, 94551220, 99029962, 154226990, 198059924, 247574905, 308453980, 495149810, 940784639, 990299620, 1881569278, 3763138556, 4703923195, 9407846390, 18815692780]

約数ペア:

[(1, 18815692780), (2, 9407846390), (4, 4703923195), (5, 3763138556), (10, 1881569278), (19, 990299620), (20, 940784639), (38, 495149810), (61, 308453980), (76, 247574905), (95, 198059924), (122, 154226990), (190, 99029962), (199, 94551220), (244, 77113495), (305, 61690796), (380, 49514981), (398, 47275610), (610, 30845398), (796, 23637805), (995, 18910244), (1159, 16234420), (1220, 15422699), (1990, 9455122), (2318, 8117210), (3781, 4976380), (3980, 4727561), (4079, 4612820), (4636, 4058605), (5795, 3246884), (7562, 2488190), (8158, 2306410), (11590, 1623442), (12139, 1550020), (15124, 1244095), (16316, 1153205), (18905, 995276), (20395, 922564), (23180, 811721), (24278, 775010), (37810, 497638), (40790, 461282), (48556, 387505), (60695, 310004), (75620, 248819), (77501, 242780), (81580, 230641), (121390, 155002)]