21021110

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22524490

約数列:

[1, 2, 5, 10, 11, 22, 41, 55, 59, 79, 82, 110, 118, 158, 205, 295, 395, 410, 451, 590, 649, 790, 869, 902, 1298, 1738, 2255, 2419, 3239, 3245, 4345, 4510, 4661, 4838, 6478, 6490, 8690, 9322, 12095, 16195, 23305, 24190, 26609, 32390, 35629, 46610, 51271, 53218, 71258, 102542, 133045, 178145, 191101, 256355, 266090, 356290, 382202, 512710, 955505, 1911010, 2102111, 4204222, 10510555, 21021110]

約数ペア:

[(1, 21021110), (2, 10510555), (5, 4204222), (10, 2102111), (11, 1911010), (22, 955505), (41, 512710), (55, 382202), (59, 356290), (79, 266090), (82, 256355), (110, 191101), (118, 178145), (158, 133045), (205, 102542), (295, 71258), (395, 53218), (410, 51271), (451, 46610), (590, 35629), (649, 32390), (790, 26609), (869, 24190), (902, 23305), (1298, 16195), (1738, 12095), (2255, 9322), (2419, 8690), (3239, 6490), (3245, 6478), (4345, 4838), (4510, 4661)]