80987500

素因数分解:

$2^2\times 5^5\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 144

約数和(自身を含む): 209986560

約数和(自身を除く): 128999060

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 31, 38, 44, 50, 55, 62, 76, 95, 100, 110, 124, 125, 155, 190, 209, 220, 250, 275, 310, 341, 380, 418, 475, 500, 550, 589, 620, 625, 682, 775, 836, 950, 1045, 1100, 1178, 1250, 1364, 1375, 1550, 1705, 1900, 2090, 2356, 2375, 2500, 2750, 2945, 3100, 3125, 3410, 3875, 4180, 4750, 5225, 5500, 5890, 6250, 6479, 6820, 6875, 7750, 8525, 9500, 10450, 11780, 11875, 12500, 12958, 13750, 14725, 15500, 17050, 19375, 20900, 23750, 25916, 26125, 27500, 29450, 32395, 34100, 34375, 38750, 42625, 47500, 52250, 58900, 59375, 64790, 68750, 73625, 77500, 85250, 96875, 104500, 118750, 129580, 130625, 137500, 147250, 161975, 170500, 193750, 213125, 237500, 261250, 294500, 323950, 368125, 387500, 426250, 522500, 647900, 653125, 736250, 809875, 852500, 1065625, 1306250, 1472500, 1619750, 1840625, 2131250, 2612500, 3239500, 3681250, 4049375, 4262500, 7362500, 8098750, 16197500, 20246875, 40493750, 80987500]

約数ペア:

[(1, 80987500), (2, 40493750), (4, 20246875), (5, 16197500), (10, 8098750), (11, 7362500), (19, 4262500), (20, 4049375), (22, 3681250), (25, 3239500), (31, 2612500), (38, 2131250), (44, 1840625), (50, 1619750), (55, 1472500), (62, 1306250), (76, 1065625), (95, 852500), (100, 809875), (110, 736250), (124, 653125), (125, 647900), (155, 522500), (190, 426250), (209, 387500), (220, 368125), (250, 323950), (275, 294500), (310, 261250), (341, 237500), (380, 213125), (418, 193750), (475, 170500), (500, 161975), (550, 147250), (589, 137500), (620, 130625), (625, 129580), (682, 118750), (775, 104500), (836, 96875), (950, 85250), (1045, 77500), (1100, 73625), (1178, 68750), (1250, 64790), (1364, 59375), (1375, 58900), (1550, 52250), (1705, 47500), (1900, 42625), (2090, 38750), (2356, 34375), (2375, 34100), (2500, 32395), (2750, 29450), (2945, 27500), (3100, 26125), (3125, 25916), (3410, 23750), (3875, 20900), (4180, 19375), (4750, 17050), (5225, 15500), (5500, 14725), (5890, 13750), (6250, 12958), (6479, 12500), (6820, 11875), (6875, 11780), (7750, 10450), (8525, 9500)]