19972875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{241}}^1$

素因数の和:289

約数の個数: 64

約数和(自身を含む): 38054016

約数和(自身を除く): 18081141

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 125, 195, 221, 241, 255, 325, 375, 425, 663, 723, 975, 1105, 1205, 1275, 1625, 2125, 3133, 3315, 3615, 4097, 4875, 5525, 6025, 6375, 9399, 12291, 15665, 16575, 18075, 20485, 27625, 30125, 46995, 53261, 61455, 78325, 82875, 90375, 102425, 159783, 234975, 266305, 307275, 391625, 512125, 798915, 1174875, 1331525, 1536375, 3994575, 6657625, 19972875]

約数ペア:

[(1, 19972875), (3, 6657625), (5, 3994575), (13, 1536375), (15, 1331525), (17, 1174875), (25, 798915), (39, 512125), (51, 391625), (65, 307275), (75, 266305), (85, 234975), (125, 159783), (195, 102425), (221, 90375), (241, 82875), (255, 78325), (325, 61455), (375, 53261), (425, 46995), (663, 30125), (723, 27625), (975, 20485), (1105, 18075), (1205, 16575), (1275, 15665), (1625, 12291), (2125, 9399), (3133, 6375), (3315, 6025), (3615, 5525), (4097, 4875)]