21036820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{8839}}^1$

素因数の和:8872

約数の個数: 48

約数和(自身を含む): 53464320

約数和(自身を除く): 32427500

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 476, 595, 1190, 2380, 8839, 17678, 35356, 44195, 61873, 88390, 123746, 150263, 176780, 247492, 300526, 309365, 601052, 618730, 751315, 1051841, 1237460, 1502630, 2103682, 3005260, 4207364, 5259205, 10518410, 21036820]

約数ペア:

[(1, 21036820), (2, 10518410), (4, 5259205), (5, 4207364), (7, 3005260), (10, 2103682), (14, 1502630), (17, 1237460), (20, 1051841), (28, 751315), (34, 618730), (35, 601052), (68, 309365), (70, 300526), (85, 247492), (119, 176780), (140, 150263), (170, 123746), (238, 88390), (340, 61873), (476, 44195), (595, 35356), (1190, 17678), (2380, 8839)]