21204180

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4363}}^1$

素因数の和:4387

約数の個数: 72

約数和(自身を含む): 66716832

約数和(自身を除く): 45512652

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4363, 4860, 8726, 13089, 17452, 21815, 26178, 39267, 43630, 52356, 65445, 78534, 87260, 117801, 130890, 157068, 196335, 235602, 261780, 353403, 392670, 471204, 589005, 706806, 785340, 1060209, 1178010, 1413612, 1767015, 2120418, 2356020, 3534030, 4240836, 5301045, 7068060, 10602090, 21204180]

約数ペア:

[(1, 21204180), (2, 10602090), (3, 7068060), (4, 5301045), (5, 4240836), (6, 3534030), (9, 2356020), (10, 2120418), (12, 1767015), (15, 1413612), (18, 1178010), (20, 1060209), (27, 785340), (30, 706806), (36, 589005), (45, 471204), (54, 392670), (60, 353403), (81, 261780), (90, 235602), (108, 196335), (135, 157068), (162, 130890), (180, 117801), (243, 87260), (270, 78534), (324, 65445), (405, 52356), (486, 43630), (540, 39267), (810, 26178), (972, 21815), (1215, 17452), (1620, 13089), (2430, 8726), (4363, 4860)]