18816760

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:328

約数の個数: 64

約数和(自身を含む): 44815680

約数和(自身を除く): 25998920

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 113, 115, 181, 184, 226, 230, 362, 452, 460, 565, 724, 904, 905, 920, 1130, 1448, 1810, 2260, 2599, 3620, 4163, 4520, 5198, 7240, 8326, 10396, 12995, 16652, 20453, 20792, 20815, 25990, 33304, 40906, 41630, 51980, 81812, 83260, 102265, 103960, 163624, 166520, 204530, 409060, 470419, 818120, 940838, 1881676, 2352095, 3763352, 4704190, 9408380, 18816760]

約数ペア:

[(1, 18816760), (2, 9408380), (4, 4704190), (5, 3763352), (8, 2352095), (10, 1881676), (20, 940838), (23, 818120), (40, 470419), (46, 409060), (92, 204530), (113, 166520), (115, 163624), (181, 103960), (184, 102265), (226, 83260), (230, 81812), (362, 51980), (452, 41630), (460, 40906), (565, 33304), (724, 25990), (904, 20815), (905, 20792), (920, 20453), (1130, 16652), (1448, 12995), (1810, 10396), (2260, 8326), (2599, 7240), (3620, 5198), (4163, 4520)]