20467750

素因数分解:

$2^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 21465050

約数列:

[1, 2, 5, 10, 19, 25, 31, 38, 50, 62, 95, 125, 139, 155, 190, 250, 278, 310, 475, 589, 695, 775, 950, 1178, 1390, 1550, 2375, 2641, 2945, 3475, 3875, 4309, 4750, 5282, 5890, 6950, 7750, 8618, 13205, 14725, 17375, 21545, 26410, 29450, 34750, 43090, 66025, 73625, 81871, 107725, 132050, 147250, 163742, 215450, 330125, 409355, 538625, 660250, 818710, 1077250, 2046775, 4093550, 10233875, 20467750]

約数ペア:

[(1, 20467750), (2, 10233875), (5, 4093550), (10, 2046775), (19, 1077250), (25, 818710), (31, 660250), (38, 538625), (50, 409355), (62, 330125), (95, 215450), (125, 163742), (139, 147250), (155, 132050), (190, 107725), (250, 81871), (278, 73625), (310, 66025), (475, 43090), (589, 34750), (695, 29450), (775, 26410), (950, 21545), (1178, 17375), (1390, 14725), (1550, 13205), (2375, 8618), (2641, 7750), (2945, 6950), (3475, 5890), (3875, 5282), (4309, 4750)]