81784750

素因数分解:

$2^1\times 5^3\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 160392960

約数和(自身を除く): 78608210

約数列:

[1, 2, 5, 10, 25, 41, 50, 79, 82, 101, 125, 158, 202, 205, 250, 395, 410, 505, 790, 1010, 1025, 1975, 2050, 2525, 3239, 3950, 4141, 5050, 5125, 6478, 7979, 8282, 9875, 10250, 12625, 15958, 16195, 19750, 20705, 25250, 32390, 39895, 41410, 79790, 80975, 103525, 161950, 199475, 207050, 327139, 398950, 404875, 517625, 654278, 809750, 997375, 1035250, 1635695, 1994750, 3271390, 8178475, 16356950, 40892375, 81784750]

約数ペア:

[(1, 81784750), (2, 40892375), (5, 16356950), (10, 8178475), (25, 3271390), (41, 1994750), (50, 1635695), (79, 1035250), (82, 997375), (101, 809750), (125, 654278), (158, 517625), (202, 404875), (205, 398950), (250, 327139), (395, 207050), (410, 199475), (505, 161950), (790, 103525), (1010, 80975), (1025, 79790), (1975, 41410), (2050, 39895), (2525, 32390), (3239, 25250), (3950, 20705), (4141, 19750), (5050, 16195), (5125, 15958), (6478, 12625), (7979, 10250), (8282, 9875)]