21680500

素因数分解:

$2^2\times 5^3\times {\mathrm{131}}^1\times {\mathrm{331}}^1$

素因数の和:481

約数の個数: 48

約数和(自身を含む): 47855808

約数和(自身を除く): 26175308

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 131, 250, 262, 331, 500, 524, 655, 662, 1310, 1324, 1655, 2620, 3275, 3310, 6550, 6620, 8275, 13100, 16375, 16550, 32750, 33100, 41375, 43361, 65500, 82750, 86722, 165500, 173444, 216805, 433610, 867220, 1084025, 2168050, 4336100, 5420125, 10840250, 21680500]

約数ペア:

[(1, 21680500), (2, 10840250), (4, 5420125), (5, 4336100), (10, 2168050), (20, 1084025), (25, 867220), (50, 433610), (100, 216805), (125, 173444), (131, 165500), (250, 86722), (262, 82750), (331, 65500), (500, 43361), (524, 41375), (655, 33100), (662, 32750), (1310, 16550), (1324, 16375), (1655, 13100), (2620, 8275), (3275, 6620), (3310, 6550)]