21169420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1$

素因数の和:187

約数の個数: 96

約数和(自身を含む): 51710400

約数和(自身を除く): 30540980

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 29, 34, 38, 58, 68, 76, 85, 95, 113, 116, 145, 170, 190, 226, 290, 323, 340, 380, 452, 493, 551, 565, 580, 646, 986, 1102, 1130, 1292, 1615, 1921, 1972, 2147, 2204, 2260, 2465, 2755, 3230, 3277, 3842, 4294, 4930, 5510, 6460, 6554, 7684, 8588, 9367, 9605, 9860, 10735, 11020, 13108, 16385, 18734, 19210, 21470, 32770, 36499, 37468, 38420, 42940, 46835, 55709, 62263, 65540, 72998, 93670, 111418, 124526, 145996, 182495, 187340, 222836, 249052, 278545, 311315, 364990, 557090, 622630, 729980, 1058471, 1114180, 1245260, 2116942, 4233884, 5292355, 10584710, 21169420]

約数ペア:

[(1, 21169420), (2, 10584710), (4, 5292355), (5, 4233884), (10, 2116942), (17, 1245260), (19, 1114180), (20, 1058471), (29, 729980), (34, 622630), (38, 557090), (58, 364990), (68, 311315), (76, 278545), (85, 249052), (95, 222836), (113, 187340), (116, 182495), (145, 145996), (170, 124526), (190, 111418), (226, 93670), (290, 72998), (323, 65540), (340, 62263), (380, 55709), (452, 46835), (493, 42940), (551, 38420), (565, 37468), (580, 36499), (646, 32770), (986, 21470), (1102, 19210), (1130, 18734), (1292, 16385), (1615, 13108), (1921, 11020), (1972, 10735), (2147, 9860), (2204, 9605), (2260, 9367), (2465, 8588), (2755, 7684), (3230, 6554), (3277, 6460), (3842, 5510), (4294, 4930)]