21045850

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{383}}^1$

素因数の和:559

約数の個数: 48

約数和(自身を含む): 45139968

約数和(自身を除く): 24094118

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 157, 175, 314, 350, 383, 766, 785, 1099, 1570, 1915, 2198, 2681, 3830, 3925, 5362, 5495, 7850, 9575, 10990, 13405, 19150, 26810, 27475, 54950, 60131, 67025, 120262, 134050, 300655, 420917, 601310, 841834, 1503275, 2104585, 3006550, 4209170, 10522925, 21045850]

約数ペア:

[(1, 21045850), (2, 10522925), (5, 4209170), (7, 3006550), (10, 2104585), (14, 1503275), (25, 841834), (35, 601310), (50, 420917), (70, 300655), (157, 134050), (175, 120262), (314, 67025), (350, 60131), (383, 54950), (766, 27475), (785, 26810), (1099, 19150), (1570, 13405), (1915, 10990), (2198, 9575), (2681, 7850), (3830, 5495), (3925, 5362)]