90180400

素因数分解:

$2^4\times 5^2\times {\mathrm{131}}^1\times {\mathrm{1721}}^1$

素因数の和:1870

約数の個数: 60

約数和(自身を含む): 218439144

約数和(自身を除く): 128258744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 131, 200, 262, 400, 524, 655, 1048, 1310, 1721, 2096, 2620, 3275, 3442, 5240, 6550, 6884, 8605, 10480, 13100, 13768, 17210, 26200, 27536, 34420, 43025, 52400, 68840, 86050, 137680, 172100, 225451, 344200, 450902, 688400, 901804, 1127255, 1803608, 2254510, 3607216, 4509020, 5636275, 9018040, 11272550, 18036080, 22545100, 45090200, 90180400]

約数ペア:

[(1, 90180400), (2, 45090200), (4, 22545100), (5, 18036080), (8, 11272550), (10, 9018040), (16, 5636275), (20, 4509020), (25, 3607216), (40, 2254510), (50, 1803608), (80, 1127255), (100, 901804), (131, 688400), (200, 450902), (262, 344200), (400, 225451), (524, 172100), (655, 137680), (1048, 86050), (1310, 68840), (1721, 52400), (2096, 43025), (2620, 34420), (3275, 27536), (3442, 26200), (5240, 17210), (6550, 13768), (6884, 13100), (8605, 10480)]