128521900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{907}}^1$

素因数の和:1043

約数の個数: 72

約数和(自身を含む): 303435440

約数和(自身を除く): 174913540

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 109, 130, 218, 260, 325, 436, 545, 650, 907, 1090, 1300, 1417, 1814, 2180, 2725, 2834, 3628, 4535, 5450, 5668, 7085, 9070, 10900, 11791, 14170, 18140, 22675, 23582, 28340, 35425, 45350, 47164, 58955, 70850, 90700, 98863, 117910, 141700, 197726, 235820, 294775, 395452, 494315, 589550, 988630, 1179100, 1285219, 1977260, 2471575, 2570438, 4943150, 5140876, 6426095, 9886300, 12852190, 25704380, 32130475, 64260950, 128521900]

約数ペア:

[(1, 128521900), (2, 64260950), (4, 32130475), (5, 25704380), (10, 12852190), (13, 9886300), (20, 6426095), (25, 5140876), (26, 4943150), (50, 2570438), (52, 2471575), (65, 1977260), (100, 1285219), (109, 1179100), (130, 988630), (218, 589550), (260, 494315), (325, 395452), (436, 294775), (545, 235820), (650, 197726), (907, 141700), (1090, 117910), (1300, 98863), (1417, 90700), (1814, 70850), (2180, 58955), (2725, 47164), (2834, 45350), (3628, 35425), (4535, 28340), (5450, 23582), (5668, 22675), (7085, 18140), (9070, 14170), (10900, 11791)]