18117560

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{419}}^1$

素因数の和:500

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 25428040

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 47, 92, 94, 115, 184, 188, 230, 235, 376, 419, 460, 470, 838, 920, 940, 1081, 1676, 1880, 2095, 2162, 3352, 4190, 4324, 5405, 8380, 8648, 9637, 10810, 16760, 19274, 19693, 21620, 38548, 39386, 43240, 48185, 77096, 78772, 96370, 98465, 157544, 192740, 196930, 385480, 393860, 452939, 787720, 905878, 1811756, 2264695, 3623512, 4529390, 9058780, 18117560]

約数ペア:

[(1, 18117560), (2, 9058780), (4, 4529390), (5, 3623512), (8, 2264695), (10, 1811756), (20, 905878), (23, 787720), (40, 452939), (46, 393860), (47, 385480), (92, 196930), (94, 192740), (115, 157544), (184, 98465), (188, 96370), (230, 78772), (235, 77096), (376, 48185), (419, 43240), (460, 39386), (470, 38548), (838, 21620), (920, 19693), (940, 19274), (1081, 16760), (1676, 10810), (1880, 9637), (2095, 8648), (2162, 8380), (3352, 5405), (4190, 4324)]