21493850

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{283}}^1$

素因数の和:340

約数の個数: 72

約数和(自身を含む): 48175488

約数和(自身を除く): 26681638

約数列:

[1, 2, 5, 7, 10, 14, 25, 31, 35, 49, 50, 62, 70, 98, 155, 175, 217, 245, 283, 310, 350, 434, 490, 566, 775, 1085, 1225, 1415, 1519, 1550, 1981, 2170, 2450, 2830, 3038, 3962, 5425, 7075, 7595, 8773, 9905, 10850, 13867, 14150, 15190, 17546, 19810, 27734, 37975, 43865, 49525, 61411, 69335, 75950, 87730, 99050, 122822, 138670, 219325, 307055, 346675, 429877, 438650, 614110, 693350, 859754, 1535275, 2149385, 3070550, 4298770, 10746925, 21493850]

約数ペア:

[(1, 21493850), (2, 10746925), (5, 4298770), (7, 3070550), (10, 2149385), (14, 1535275), (25, 859754), (31, 693350), (35, 614110), (49, 438650), (50, 429877), (62, 346675), (70, 307055), (98, 219325), (155, 138670), (175, 122822), (217, 99050), (245, 87730), (283, 75950), (310, 69335), (350, 61411), (434, 49525), (490, 43865), (566, 37975), (775, 27734), (1085, 19810), (1225, 17546), (1415, 15190), (1519, 14150), (1550, 13867), (1981, 10850), (2170, 9905), (2450, 8773), (2830, 7595), (3038, 7075), (3962, 5425)]