20500760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{347}}^1$

素因数の和:576

約数の個数: 64

約数和(自身を含む): 53118720

約数和(自身を除く): 32617960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 211, 280, 347, 422, 694, 844, 1055, 1388, 1477, 1688, 1735, 2110, 2429, 2776, 2954, 3470, 4220, 4858, 5908, 6940, 7385, 8440, 9716, 11816, 12145, 13880, 14770, 19432, 24290, 29540, 48580, 59080, 73217, 97160, 146434, 292868, 366085, 512519, 585736, 732170, 1025038, 1464340, 2050076, 2562595, 2928680, 4100152, 5125190, 10250380, 20500760]

約数ペア:

[(1, 20500760), (2, 10250380), (4, 5125190), (5, 4100152), (7, 2928680), (8, 2562595), (10, 2050076), (14, 1464340), (20, 1025038), (28, 732170), (35, 585736), (40, 512519), (56, 366085), (70, 292868), (140, 146434), (211, 97160), (280, 73217), (347, 59080), (422, 48580), (694, 29540), (844, 24290), (1055, 19432), (1388, 14770), (1477, 13880), (1688, 12145), (1735, 11816), (2110, 9716), (2429, 8440), (2776, 7385), (2954, 6940), (3470, 5908), (4220, 4858)]