21753165

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 42319872

約数和(自身を除く): 20566707

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 41, 93, 105, 123, 155, 163, 205, 217, 287, 465, 489, 615, 651, 815, 861, 1085, 1141, 1271, 1435, 2445, 3255, 3423, 3813, 4305, 5053, 5705, 6355, 6683, 8897, 15159, 17115, 19065, 20049, 25265, 26691, 33415, 35371, 44485, 46781, 75795, 100245, 106113, 133455, 140343, 176855, 207173, 233905, 530565, 621519, 701715, 1035865, 1450211, 3107595, 4350633, 7251055, 21753165]

約数ペア:

[(1, 21753165), (3, 7251055), (5, 4350633), (7, 3107595), (15, 1450211), (21, 1035865), (31, 701715), (35, 621519), (41, 530565), (93, 233905), (105, 207173), (123, 176855), (155, 140343), (163, 133455), (205, 106113), (217, 100245), (287, 75795), (465, 46781), (489, 44485), (615, 35371), (651, 33415), (815, 26691), (861, 25265), (1085, 20049), (1141, 19065), (1271, 17115), (1435, 15159), (2445, 8897), (3255, 6683), (3423, 6355), (3813, 5705), (4305, 5053)]