81301780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3607}}^1$

素因数の和:3653

約数の個数: 72

約数和(自身を含む): 207301248

約数和(自身を除く): 125999468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 980, 1127, 1610, 2254, 3220, 3607, 4508, 5635, 7214, 11270, 14428, 18035, 22540, 25249, 36070, 50498, 72140, 82961, 100996, 126245, 165922, 176743, 252490, 331844, 353486, 414805, 504980, 580727, 706972, 829610, 883715, 1161454, 1659220, 1767430, 2322908, 2903635, 3534860, 4065089, 5807270, 8130178, 11614540, 16260356, 20325445, 40650890, 81301780]

約数ペア:

[(1, 81301780), (2, 40650890), (4, 20325445), (5, 16260356), (7, 11614540), (10, 8130178), (14, 5807270), (20, 4065089), (23, 3534860), (28, 2903635), (35, 2322908), (46, 1767430), (49, 1659220), (70, 1161454), (92, 883715), (98, 829610), (115, 706972), (140, 580727), (161, 504980), (196, 414805), (230, 353486), (245, 331844), (322, 252490), (460, 176743), (490, 165922), (644, 126245), (805, 100996), (980, 82961), (1127, 72140), (1610, 50498), (2254, 36070), (3220, 25249), (3607, 22540), (4508, 18035), (5635, 14428), (7214, 11270)]