13280720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{4049}}^1$

素因数の和:4103

約数の個数: 40

約数和(自身を含む): 31638600

約数和(自身を除く): 18357880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 4049, 8098, 16196, 20245, 32392, 40490, 64784, 80980, 161960, 166009, 323920, 332018, 664036, 830045, 1328072, 1660090, 2656144, 3320180, 6640360, 13280720]

約数ペア:

[(1, 13280720), (2, 6640360), (4, 3320180), (5, 2656144), (8, 1660090), (10, 1328072), (16, 830045), (20, 664036), (40, 332018), (41, 323920), (80, 166009), (82, 161960), (164, 80980), (205, 64784), (328, 40490), (410, 32392), (656, 20245), (820, 16196), (1640, 8098), (3280, 4049)]