81646990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:337

約数の個数: 64

約数和(自身を含む): 162570240

約数和(自身を除く): 80923250

約数列:

[1, 2, 5, 10, 19, 38, 41, 47, 82, 94, 95, 190, 205, 223, 235, 410, 446, 470, 779, 893, 1115, 1558, 1786, 1927, 2230, 3854, 3895, 4237, 4465, 7790, 8474, 8930, 9143, 9635, 10481, 18286, 19270, 20962, 21185, 36613, 42370, 45715, 52405, 73226, 91430, 104810, 173717, 183065, 199139, 347434, 366130, 398278, 429721, 859442, 868585, 995695, 1737170, 1991390, 2148605, 4297210, 8164699, 16329398, 40823495, 81646990]

約数ペア:

[(1, 81646990), (2, 40823495), (5, 16329398), (10, 8164699), (19, 4297210), (38, 2148605), (41, 1991390), (47, 1737170), (82, 995695), (94, 868585), (95, 859442), (190, 429721), (205, 398278), (223, 366130), (235, 347434), (410, 199139), (446, 183065), (470, 173717), (779, 104810), (893, 91430), (1115, 73226), (1558, 52405), (1786, 45715), (1927, 42370), (2230, 36613), (3854, 21185), (3895, 20962), (4237, 19270), (4465, 18286), (7790, 10481), (8474, 9635), (8930, 9143)]