20001440

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3049}}^1$

素因数の和:3105

約数の個数: 48

約数和(自身を含む): 48421800

約数和(自身を除く): 28420360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3049, 3280, 6098, 6560, 12196, 15245, 24392, 30490, 48784, 60980, 97568, 121960, 125009, 243920, 250018, 487840, 500036, 625045, 1000072, 1250090, 2000144, 2500180, 4000288, 5000360, 10000720, 20001440]

約数ペア:

[(1, 20001440), (2, 10000720), (4, 5000360), (5, 4000288), (8, 2500180), (10, 2000144), (16, 1250090), (20, 1000072), (32, 625045), (40, 500036), (41, 487840), (80, 250018), (82, 243920), (160, 125009), (164, 121960), (205, 97568), (328, 60980), (410, 48784), (656, 30490), (820, 24392), (1312, 15245), (1640, 12196), (3049, 6560), (3280, 6098)]