21995575

素因数分解:

$5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 33172480

約数和(自身を除く): 11176905

約数列:

[1, 5, 7, 25, 35, 37, 43, 79, 175, 185, 215, 259, 301, 395, 553, 925, 1075, 1295, 1505, 1591, 1975, 2765, 2923, 3397, 6475, 7525, 7955, 11137, 13825, 14615, 16985, 20461, 23779, 39775, 55685, 73075, 84925, 102305, 118895, 125689, 278425, 511525, 594475, 628445, 879823, 3142225, 4399115, 21995575]

約数ペア:

[(1, 21995575), (5, 4399115), (7, 3142225), (25, 879823), (35, 628445), (37, 594475), (43, 511525), (79, 278425), (175, 125689), (185, 118895), (215, 102305), (259, 84925), (301, 73075), (395, 55685), (553, 39775), (925, 23779), (1075, 20461), (1295, 16985), (1505, 14615), (1591, 13825), (1975, 11137), (2765, 7955), (2923, 7525), (3397, 6475)]