19965770

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{233}}^1$

素因数の和:311

約数の個数: 64

約数和(自身を含む): 42456960

約数和(自身を除く): 22491190

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 41, 55, 82, 95, 110, 190, 205, 209, 233, 410, 418, 451, 466, 779, 902, 1045, 1165, 1558, 2090, 2255, 2330, 2563, 3895, 4427, 4510, 5126, 7790, 8569, 8854, 9553, 12815, 17138, 19106, 22135, 25630, 42845, 44270, 47765, 48697, 85690, 95530, 97394, 105083, 181507, 210166, 243485, 363014, 486970, 525415, 907535, 1050830, 1815070, 1996577, 3993154, 9982885, 19965770]

約数ペア:

[(1, 19965770), (2, 9982885), (5, 3993154), (10, 1996577), (11, 1815070), (19, 1050830), (22, 907535), (38, 525415), (41, 486970), (55, 363014), (82, 243485), (95, 210166), (110, 181507), (190, 105083), (205, 97394), (209, 95530), (233, 85690), (410, 48697), (418, 47765), (451, 44270), (466, 42845), (779, 25630), (902, 22135), (1045, 19106), (1165, 17138), (1558, 12815), (2090, 9553), (2255, 8854), (2330, 8569), (2563, 7790), (3895, 5126), (4427, 4510)]