28180000

素因数分解:

$2^5\times 5^4\times {\mathrm{1409}}^1$

素因数の和:1439

約数の個数: 60

約数和(自身を含む): 69376230

約数和(自身を除く): 41196230

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 1409, 2000, 2500, 2818, 4000, 5000, 5636, 7045, 10000, 11272, 14090, 20000, 22544, 28180, 35225, 45088, 56360, 70450, 112720, 140900, 176125, 225440, 281800, 352250, 563600, 704500, 880625, 1127200, 1409000, 1761250, 2818000, 3522500, 5636000, 7045000, 14090000, 28180000]

約数ペア:

[(1, 28180000), (2, 14090000), (4, 7045000), (5, 5636000), (8, 3522500), (10, 2818000), (16, 1761250), (20, 1409000), (25, 1127200), (32, 880625), (40, 704500), (50, 563600), (80, 352250), (100, 281800), (125, 225440), (160, 176125), (200, 140900), (250, 112720), (400, 70450), (500, 56360), (625, 45088), (800, 35225), (1000, 28180), (1250, 22544), (1409, 20000), (2000, 14090), (2500, 11272), (2818, 10000), (4000, 7045), (5000, 5636)]