77900000

素因数分解:

$2^5\times 5^5\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:95

約数の個数: 144

約数和(自身を含む): 206705520

約数和(自身を除く): 128805520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 41, 50, 76, 80, 82, 95, 100, 125, 152, 160, 164, 190, 200, 205, 250, 304, 328, 380, 400, 410, 475, 500, 608, 625, 656, 760, 779, 800, 820, 950, 1000, 1025, 1250, 1312, 1520, 1558, 1640, 1900, 2000, 2050, 2375, 2500, 3040, 3116, 3125, 3280, 3800, 3895, 4000, 4100, 4750, 5000, 5125, 6232, 6250, 6560, 7600, 7790, 8200, 9500, 10000, 10250, 11875, 12464, 12500, 15200, 15580, 16400, 19000, 19475, 20000, 20500, 23750, 24928, 25000, 25625, 31160, 32800, 38000, 38950, 41000, 47500, 50000, 51250, 59375, 62320, 76000, 77900, 82000, 95000, 97375, 100000, 102500, 118750, 124640, 128125, 155800, 164000, 190000, 194750, 205000, 237500, 256250, 311600, 380000, 389500, 410000, 475000, 486875, 512500, 623200, 779000, 820000, 950000, 973750, 1025000, 1558000, 1900000, 1947500, 2050000, 2434375, 3116000, 3895000, 4100000, 4868750, 7790000, 9737500, 15580000, 19475000, 38950000, 77900000]

約数ペア:

[(1, 77900000), (2, 38950000), (4, 19475000), (5, 15580000), (8, 9737500), (10, 7790000), (16, 4868750), (19, 4100000), (20, 3895000), (25, 3116000), (32, 2434375), (38, 2050000), (40, 1947500), (41, 1900000), (50, 1558000), (76, 1025000), (80, 973750), (82, 950000), (95, 820000), (100, 779000), (125, 623200), (152, 512500), (160, 486875), (164, 475000), (190, 410000), (200, 389500), (205, 380000), (250, 311600), (304, 256250), (328, 237500), (380, 205000), (400, 194750), (410, 190000), (475, 164000), (500, 155800), (608, 128125), (625, 124640), (656, 118750), (760, 102500), (779, 100000), (800, 97375), (820, 95000), (950, 82000), (1000, 77900), (1025, 76000), (1250, 62320), (1312, 59375), (1520, 51250), (1558, 50000), (1640, 47500), (1900, 41000), (2000, 38950), (2050, 38000), (2375, 32800), (2500, 31160), (3040, 25625), (3116, 25000), (3125, 24928), (3280, 23750), (3800, 20500), (3895, 20000), (4000, 19475), (4100, 19000), (4750, 16400), (5000, 15580), (5125, 15200), (6232, 12500), (6250, 12464), (6560, 11875), (7600, 10250), (7790, 10000), (8200, 9500)]