21888790

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:194

約数の個数: 96

約数和(自身を含む): 52005888

約数和(自身を除く): 30117098

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 31, 35, 49, 55, 62, 70, 77, 98, 110, 131, 154, 155, 217, 245, 262, 310, 341, 385, 434, 490, 539, 655, 682, 770, 917, 1078, 1085, 1310, 1441, 1519, 1705, 1834, 2170, 2387, 2695, 2882, 3038, 3410, 4061, 4585, 4774, 5390, 6419, 7205, 7595, 8122, 9170, 10087, 11935, 12838, 14410, 15190, 16709, 20174, 20305, 23870, 28427, 32095, 33418, 40610, 44671, 50435, 56854, 64190, 70609, 83545, 89342, 100870, 141218, 142135, 167090, 198989, 223355, 284270, 312697, 353045, 397978, 446710, 625394, 706090, 994945, 1563485, 1989890, 2188879, 3126970, 4377758, 10944395, 21888790]

約数ペア:

[(1, 21888790), (2, 10944395), (5, 4377758), (7, 3126970), (10, 2188879), (11, 1989890), (14, 1563485), (22, 994945), (31, 706090), (35, 625394), (49, 446710), (55, 397978), (62, 353045), (70, 312697), (77, 284270), (98, 223355), (110, 198989), (131, 167090), (154, 142135), (155, 141218), (217, 100870), (245, 89342), (262, 83545), (310, 70609), (341, 64190), (385, 56854), (434, 50435), (490, 44671), (539, 40610), (655, 33418), (682, 32095), (770, 28427), (917, 23870), (1078, 20305), (1085, 20174), (1310, 16709), (1441, 15190), (1519, 14410), (1705, 12838), (1834, 11935), (2170, 10087), (2387, 9170), (2695, 8122), (2882, 7595), (3038, 7205), (3410, 6419), (4061, 5390), (4585, 4774)]