19917520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5081}}^1$

素因数の和:5108

約数の個数: 60

約数和(自身を含む): 53879364

約数和(自身を除く): 33961844

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5081, 10162, 20324, 25405, 35567, 40648, 50810, 71134, 81296, 101620, 142268, 177835, 203240, 248969, 284536, 355670, 406480, 497938, 569072, 711340, 995876, 1244845, 1422680, 1991752, 2489690, 2845360, 3983504, 4979380, 9958760, 19917520]

約数ペア:

[(1, 19917520), (2, 9958760), (4, 4979380), (5, 3983504), (7, 2845360), (8, 2489690), (10, 1991752), (14, 1422680), (16, 1244845), (20, 995876), (28, 711340), (35, 569072), (40, 497938), (49, 406480), (56, 355670), (70, 284536), (80, 248969), (98, 203240), (112, 177835), (140, 142268), (196, 101620), (245, 81296), (280, 71134), (392, 50810), (490, 40648), (560, 35567), (784, 25405), (980, 20324), (1960, 10162), (3920, 5081)]