81895040

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3121}}^1$

素因数の和:3181

約数の個数: 64

約数和(自身を含む): 200619720

約数和(自身を除く): 118724680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 820, 1312, 1640, 2624, 3121, 3280, 5248, 6242, 6560, 12484, 13120, 15605, 24968, 26240, 31210, 49936, 62420, 99872, 124840, 127961, 199744, 249680, 255922, 399488, 499360, 511844, 639805, 998720, 1023688, 1279610, 1997440, 2047376, 2559220, 4094752, 5118440, 8189504, 10236880, 16379008, 20473760, 40947520, 81895040]

約数ペア:

[(1, 81895040), (2, 40947520), (4, 20473760), (5, 16379008), (8, 10236880), (10, 8189504), (16, 5118440), (20, 4094752), (32, 2559220), (40, 2047376), (41, 1997440), (64, 1279610), (80, 1023688), (82, 998720), (128, 639805), (160, 511844), (164, 499360), (205, 399488), (320, 255922), (328, 249680), (410, 199744), (640, 127961), (656, 124840), (820, 99872), (1312, 62420), (1640, 49936), (2624, 31210), (3121, 26240), (3280, 24968), (5248, 15605), (6242, 13120), (6560, 12484)]