20189680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1163}}^1$

素因数の和:1214

約数の個数: 80

約数和(自身を含む): 55425024

約数和(自身を除く): 35235344

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1163, 1240, 1736, 2170, 2326, 2480, 3472, 4340, 4652, 5815, 8141, 8680, 9304, 11630, 16282, 17360, 18608, 23260, 32564, 36053, 40705, 46520, 65128, 72106, 81410, 93040, 130256, 144212, 162820, 180265, 252371, 288424, 325640, 360530, 504742, 576848, 651280, 721060, 1009484, 1261855, 1442120, 2018968, 2523710, 2884240, 4037936, 5047420, 10094840, 20189680]

約数ペア:

[(1, 20189680), (2, 10094840), (4, 5047420), (5, 4037936), (7, 2884240), (8, 2523710), (10, 2018968), (14, 1442120), (16, 1261855), (20, 1009484), (28, 721060), (31, 651280), (35, 576848), (40, 504742), (56, 360530), (62, 325640), (70, 288424), (80, 252371), (112, 180265), (124, 162820), (140, 144212), (155, 130256), (217, 93040), (248, 81410), (280, 72106), (310, 65128), (434, 46520), (496, 40705), (560, 36053), (620, 32564), (868, 23260), (1085, 18608), (1163, 17360), (1240, 16282), (1736, 11630), (2170, 9304), (2326, 8680), (2480, 8141), (3472, 5815), (4340, 4652)]