18209000

素因数分解:

$2^3\times 5^3\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 43243200

約数和(自身を除く): 25034200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 131, 139, 200, 250, 262, 278, 500, 524, 556, 655, 695, 1000, 1048, 1112, 1310, 1390, 2620, 2780, 3275, 3475, 5240, 5560, 6550, 6950, 13100, 13900, 16375, 17375, 18209, 26200, 27800, 32750, 34750, 36418, 65500, 69500, 72836, 91045, 131000, 139000, 145672, 182090, 364180, 455225, 728360, 910450, 1820900, 2276125, 3641800, 4552250, 9104500, 18209000]

約数ペア:

[(1, 18209000), (2, 9104500), (4, 4552250), (5, 3641800), (8, 2276125), (10, 1820900), (20, 910450), (25, 728360), (40, 455225), (50, 364180), (100, 182090), (125, 145672), (131, 139000), (139, 131000), (200, 91045), (250, 72836), (262, 69500), (278, 65500), (500, 36418), (524, 34750), (556, 32750), (655, 27800), (695, 26200), (1000, 18209), (1048, 17375), (1112, 16375), (1310, 13900), (1390, 13100), (2620, 6950), (2780, 6550), (3275, 5560), (3475, 5240)]