19916500

素因数分解:

$2^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{653}}^1$

素因数の和:733

約数の個数: 48

約数和(自身を含む): 44278416

約数和(自身を除く): 24361916

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 244, 250, 305, 500, 610, 653, 1220, 1306, 1525, 2612, 3050, 3265, 6100, 6530, 7625, 13060, 15250, 16325, 30500, 32650, 39833, 65300, 79666, 81625, 159332, 163250, 199165, 326500, 398330, 796660, 995825, 1991650, 3983300, 4979125, 9958250, 19916500]

約数ペア:

[(1, 19916500), (2, 9958250), (4, 4979125), (5, 3983300), (10, 1991650), (20, 995825), (25, 796660), (50, 398330), (61, 326500), (100, 199165), (122, 163250), (125, 159332), (244, 81625), (250, 79666), (305, 65300), (500, 39833), (610, 32650), (653, 30500), (1220, 16325), (1306, 15250), (1525, 13060), (2612, 7625), (3050, 6530), (3265, 6100)]