21014721

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2851}}^1$

素因数の和:2883

約数の個数: 40

約数和(自身を含む): 38650304

約数和(自身を除く): 17635583

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2851, 7371, 8553, 19957, 25659, 37063, 59871, 76977, 111189, 179613, 230931, 259441, 333567, 538839, 778323, 1000701, 1616517, 2334969, 3002103, 7004907, 21014721]

約数ペア:

[(1, 21014721), (3, 7004907), (7, 3002103), (9, 2334969), (13, 1616517), (21, 1000701), (27, 778323), (39, 538839), (63, 333567), (81, 259441), (91, 230931), (117, 179613), (189, 111189), (273, 76977), (351, 59871), (567, 37063), (819, 25659), (1053, 19957), (2457, 8553), (2851, 7371)]