19913300

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:489

約数の個数: 72

約数和(自身を含む): 48351072

約数和(自身を除く): 28437772

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 100, 110, 172, 215, 220, 275, 421, 430, 473, 550, 842, 860, 946, 1075, 1100, 1684, 1892, 2105, 2150, 2365, 4210, 4300, 4631, 4730, 8420, 9262, 9460, 10525, 11825, 18103, 18524, 21050, 23155, 23650, 36206, 42100, 46310, 47300, 72412, 90515, 92620, 115775, 181030, 199133, 231550, 362060, 398266, 452575, 463100, 796532, 905150, 995665, 1810300, 1991330, 3982660, 4978325, 9956650, 19913300]

約数ペア:

[(1, 19913300), (2, 9956650), (4, 4978325), (5, 3982660), (10, 1991330), (11, 1810300), (20, 995665), (22, 905150), (25, 796532), (43, 463100), (44, 452575), (50, 398266), (55, 362060), (86, 231550), (100, 199133), (110, 181030), (172, 115775), (215, 92620), (220, 90515), (275, 72412), (421, 47300), (430, 46310), (473, 42100), (550, 36206), (842, 23650), (860, 23155), (946, 21050), (1075, 18524), (1100, 18103), (1684, 11825), (1892, 10525), (2105, 9460), (2150, 9262), (2365, 8420), (4210, 4730), (4300, 4631)]