81579820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{15749}}^1$

素因数の和:15802

約数の個数: 48

約数和(自身を含む): 201096000

約数和(自身を除く): 119516180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 5180, 15749, 31498, 62996, 78745, 110243, 157490, 220486, 314980, 440972, 551215, 582713, 1102430, 1165426, 2204860, 2330852, 2913565, 4078991, 5827130, 8157982, 11654260, 16315964, 20394955, 40789910, 81579820]

約数ペア:

[(1, 81579820), (2, 40789910), (4, 20394955), (5, 16315964), (7, 11654260), (10, 8157982), (14, 5827130), (20, 4078991), (28, 2913565), (35, 2330852), (37, 2204860), (70, 1165426), (74, 1102430), (140, 582713), (148, 551215), (185, 440972), (259, 314980), (370, 220486), (518, 157490), (740, 110243), (1036, 78745), (1295, 62996), (2590, 31498), (5180, 15749)]