21304325

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 32378880

約数和(自身を除く): 11074555

約数列:

[1, 5, 7, 23, 25, 35, 67, 79, 115, 161, 175, 335, 395, 469, 553, 575, 805, 1541, 1675, 1817, 1975, 2345, 2765, 4025, 5293, 7705, 9085, 10787, 11725, 12719, 13825, 26465, 37051, 38525, 45425, 53935, 63595, 121739, 132325, 185255, 269675, 317975, 608695, 852173, 926275, 3043475, 4260865, 21304325]

約数ペア:

[(1, 21304325), (5, 4260865), (7, 3043475), (23, 926275), (25, 852173), (35, 608695), (67, 317975), (79, 269675), (115, 185255), (161, 132325), (175, 121739), (335, 63595), (395, 53935), (469, 45425), (553, 38525), (575, 37051), (805, 26465), (1541, 13825), (1675, 12719), (1817, 11725), (1975, 10787), (2345, 9085), (2765, 7705), (4025, 5293)]