40900000

素因数分解:

$2^5\times 5^5\times {\mathrm{409}}^1$

素因数の和:444

約数の個数: 72

約数和(自身を含む): 100891980

約数和(自身を除く): 59991980

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 409, 500, 625, 800, 818, 1000, 1250, 1636, 2000, 2045, 2500, 3125, 3272, 4000, 4090, 5000, 6250, 6544, 8180, 10000, 10225, 12500, 13088, 16360, 20000, 20450, 25000, 32720, 40900, 50000, 51125, 65440, 81800, 100000, 102250, 163600, 204500, 255625, 327200, 409000, 511250, 818000, 1022500, 1278125, 1636000, 2045000, 2556250, 4090000, 5112500, 8180000, 10225000, 20450000, 40900000]

約数ペア:

[(1, 40900000), (2, 20450000), (4, 10225000), (5, 8180000), (8, 5112500), (10, 4090000), (16, 2556250), (20, 2045000), (25, 1636000), (32, 1278125), (40, 1022500), (50, 818000), (80, 511250), (100, 409000), (125, 327200), (160, 255625), (200, 204500), (250, 163600), (400, 102250), (409, 100000), (500, 81800), (625, 65440), (800, 51125), (818, 50000), (1000, 40900), (1250, 32720), (1636, 25000), (2000, 20450), (2045, 20000), (2500, 16360), (3125, 13088), (3272, 12500), (4000, 10225), (4090, 10000), (5000, 8180), (6250, 6544)]