81378800

素因数分解:

$2^4\times 5^2\times {\mathrm{389}}^1\times {\mathrm{523}}^1$

素因数の和:930

約数の個数: 60

約数和(自身を含む): 196389960

約数和(自身を除く): 115011160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 389, 400, 523, 778, 1046, 1556, 1945, 2092, 2615, 3112, 3890, 4184, 5230, 6224, 7780, 8368, 9725, 10460, 13075, 15560, 19450, 20920, 26150, 31120, 38900, 41840, 52300, 77800, 104600, 155600, 203447, 209200, 406894, 813788, 1017235, 1627576, 2034470, 3255152, 4068940, 5086175, 8137880, 10172350, 16275760, 20344700, 40689400, 81378800]

約数ペア:

[(1, 81378800), (2, 40689400), (4, 20344700), (5, 16275760), (8, 10172350), (10, 8137880), (16, 5086175), (20, 4068940), (25, 3255152), (40, 2034470), (50, 1627576), (80, 1017235), (100, 813788), (200, 406894), (389, 209200), (400, 203447), (523, 155600), (778, 104600), (1046, 77800), (1556, 52300), (1945, 41840), (2092, 38900), (2615, 31120), (3112, 26150), (3890, 20920), (4184, 19450), (5230, 15560), (6224, 13075), (7780, 10460), (8368, 9725)]