21535475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:156

約数の個数: 48

約数和(自身を含む): 31164672

約数和(自身を除く): 9629197

約数列:

[1, 5, 13, 23, 25, 43, 65, 67, 115, 215, 299, 325, 335, 559, 575, 871, 989, 1075, 1495, 1541, 1675, 2795, 2881, 4355, 4945, 7475, 7705, 12857, 13975, 14405, 20033, 21775, 24725, 37453, 38525, 64285, 66263, 72025, 100165, 187265, 321425, 331315, 500825, 861419, 936325, 1656575, 4307095, 21535475]

約数ペア:

[(1, 21535475), (5, 4307095), (13, 1656575), (23, 936325), (25, 861419), (43, 500825), (65, 331315), (67, 321425), (115, 187265), (215, 100165), (299, 72025), (325, 66263), (335, 64285), (559, 38525), (575, 37453), (871, 24725), (989, 21775), (1075, 20033), (1495, 14405), (1541, 13975), (1675, 12857), (2795, 7705), (2881, 7475), (4355, 4945)]