19816225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{241}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 30248064

約数和(自身を除く): 10431839

約数列:

[1, 5, 11, 13, 23, 25, 55, 65, 115, 143, 241, 253, 275, 299, 325, 575, 715, 1205, 1265, 1495, 2651, 3133, 3289, 3575, 5543, 6025, 6325, 7475, 13255, 15665, 16445, 27715, 34463, 60973, 66275, 72059, 78325, 82225, 138575, 172315, 304865, 360295, 792649, 861575, 1524325, 1801475, 3963245, 19816225]

約数ペア:

[(1, 19816225), (5, 3963245), (11, 1801475), (13, 1524325), (23, 861575), (25, 792649), (55, 360295), (65, 304865), (115, 172315), (143, 138575), (241, 82225), (253, 78325), (275, 72059), (299, 66275), (325, 60973), (575, 34463), (715, 27715), (1205, 16445), (1265, 15665), (1495, 13255), (2651, 7475), (3133, 6325), (3289, 6025), (3575, 5543)]