18721675

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:101

約数の個数: 72

約数和(自身を含む): 30533760

約数和(自身を除く): 11812085

約数列:

[1, 5, 7, 17, 25, 29, 31, 35, 49, 85, 119, 145, 155, 175, 203, 217, 245, 425, 493, 527, 595, 725, 775, 833, 899, 1015, 1085, 1225, 1421, 1519, 2465, 2635, 2975, 3451, 3689, 4165, 4495, 5075, 5425, 6293, 7105, 7595, 12325, 13175, 15283, 17255, 18445, 20825, 22475, 24157, 25823, 31465, 35525, 37975, 44051, 76415, 86275, 92225, 106981, 120785, 129115, 157325, 220255, 382075, 534905, 603925, 645575, 748867, 1101275, 2674525, 3744335, 18721675]

約数ペア:

[(1, 18721675), (5, 3744335), (7, 2674525), (17, 1101275), (25, 748867), (29, 645575), (31, 603925), (35, 534905), (49, 382075), (85, 220255), (119, 157325), (145, 129115), (155, 120785), (175, 106981), (203, 92225), (217, 86275), (245, 76415), (425, 44051), (493, 37975), (527, 35525), (595, 31465), (725, 25823), (775, 24157), (833, 22475), (899, 20825), (1015, 18445), (1085, 17255), (1225, 15283), (1421, 13175), (1519, 12325), (2465, 7595), (2635, 7105), (2975, 6293), (3451, 5425), (3689, 5075), (4165, 4495)]