21664980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3253}}^1$

素因数の和:3305

約数の個数: 72

約数和(自身を含む): 67513992

約数和(自身を除く): 45849012

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3253, 3330, 6506, 6660, 9759, 13012, 16265, 19518, 29277, 32530, 39036, 48795, 58554, 65060, 97590, 117108, 120361, 146385, 195180, 240722, 292770, 361083, 481444, 585540, 601805, 722166, 1083249, 1203610, 1444332, 1805415, 2166498, 2407220, 3610830, 4332996, 5416245, 7221660, 10832490, 21664980]

約数ペア:

[(1, 21664980), (2, 10832490), (3, 7221660), (4, 5416245), (5, 4332996), (6, 3610830), (9, 2407220), (10, 2166498), (12, 1805415), (15, 1444332), (18, 1203610), (20, 1083249), (30, 722166), (36, 601805), (37, 585540), (45, 481444), (60, 361083), (74, 292770), (90, 240722), (111, 195180), (148, 146385), (180, 120361), (185, 117108), (222, 97590), (333, 65060), (370, 58554), (444, 48795), (555, 39036), (666, 32530), (740, 29277), (1110, 19518), (1332, 16265), (1665, 13012), (2220, 9759), (3253, 6660), (3330, 6506)]