21831255

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 19640745

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 79, 89, 115, 135, 207, 237, 267, 345, 395, 445, 621, 711, 801, 1035, 1185, 1335, 1817, 2047, 2133, 2403, 3105, 3555, 4005, 5451, 6141, 7031, 9085, 10235, 10665, 12015, 16353, 18423, 21093, 27255, 30705, 35155, 49059, 55269, 63279, 81765, 92115, 105465, 161713, 189837, 245295, 276345, 316395, 485139, 808565, 949185, 1455417, 2425695, 4366251, 7277085, 21831255]

約数ペア:

[(1, 21831255), (3, 7277085), (5, 4366251), (9, 2425695), (15, 1455417), (23, 949185), (27, 808565), (45, 485139), (69, 316395), (79, 276345), (89, 245295), (115, 189837), (135, 161713), (207, 105465), (237, 92115), (267, 81765), (345, 63279), (395, 55269), (445, 49059), (621, 35155), (711, 30705), (801, 27255), (1035, 21093), (1185, 18423), (1335, 16353), (1817, 12015), (2047, 10665), (2133, 10235), (2403, 9085), (3105, 7031), (3555, 6141), (4005, 5451)]