21178115

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:323

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9234685

約数列:

[1, 5, 7, 31, 35, 131, 149, 155, 217, 655, 745, 917, 1043, 1085, 4061, 4585, 4619, 5215, 19519, 20305, 23095, 28427, 32333, 97595, 136633, 142135, 161665, 605089, 683165, 3025445, 4235623, 21178115]

約数ペア:

[(1, 21178115), (5, 4235623), (7, 3025445), (31, 683165), (35, 605089), (131, 161665), (149, 142135), (155, 136633), (217, 97595), (655, 32333), (745, 28427), (917, 23095), (1043, 20305), (1085, 19519), (4061, 5215), (4585, 4619)]