20161294900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{69259}}^1$

素因数の和:69385

約数の個数: 72

約数和(自身を含む): 45448966080

約数和(自身を除く): 25287671180

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 71, 82, 100, 142, 164, 205, 284, 355, 410, 710, 820, 1025, 1420, 1775, 2050, 2911, 3550, 4100, 5822, 7100, 11644, 14555, 29110, 58220, 69259, 72775, 138518, 145550, 277036, 291100, 346295, 692590, 1385180, 1731475, 2839619, 3462950, 4917389, 5679238, 6925900, 9834778, 11358476, 14198095, 19669556, 24586945, 28396190, 49173890, 56792380, 70990475, 98347780, 122934725, 141980950, 201612949, 245869450, 283961900, 403225898, 491738900, 806451796, 1008064745, 2016129490, 4032258980, 5040323725, 10080647450, 20161294900]

約数ペア:

[(1, 20161294900), (2, 10080647450), (4, 5040323725), (5, 4032258980), (10, 2016129490), (20, 1008064745), (25, 806451796), (41, 491738900), (50, 403225898), (71, 283961900), (82, 245869450), (100, 201612949), (142, 141980950), (164, 122934725), (205, 98347780), (284, 70990475), (355, 56792380), (410, 49173890), (710, 28396190), (820, 24586945), (1025, 19669556), (1420, 14198095), (1775, 11358476), (2050, 9834778), (2911, 6925900), (3550, 5679238), (4100, 4917389), (5822, 3462950), (7100, 2839619), (11644, 1731475), (14555, 1385180), (29110, 692590), (58220, 346295), (69259, 291100), (72775, 277036), (138518, 145550)]