21660940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:108

約数の個数: 108

約数和(自身を含む): 57053808

約数和(自身を除く): 35392868

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 31, 35, 46, 49, 62, 70, 92, 98, 115, 124, 140, 155, 161, 196, 217, 230, 245, 310, 322, 434, 460, 490, 620, 644, 713, 805, 868, 961, 980, 1085, 1127, 1426, 1519, 1610, 1922, 2170, 2254, 2852, 3038, 3220, 3565, 3844, 4340, 4508, 4805, 4991, 5635, 6076, 6727, 7130, 7595, 9610, 9982, 11270, 13454, 14260, 15190, 19220, 19964, 22103, 22540, 24955, 26908, 30380, 33635, 34937, 44206, 47089, 49910, 67270, 69874, 88412, 94178, 99820, 110515, 134540, 139748, 154721, 174685, 188356, 221030, 235445, 309442, 349370, 442060, 470890, 618884, 698740, 773605, 941780, 1083047, 1547210, 2166094, 3094420, 4332188, 5415235, 10830470, 21660940]

約数ペア:

[(1, 21660940), (2, 10830470), (4, 5415235), (5, 4332188), (7, 3094420), (10, 2166094), (14, 1547210), (20, 1083047), (23, 941780), (28, 773605), (31, 698740), (35, 618884), (46, 470890), (49, 442060), (62, 349370), (70, 309442), (92, 235445), (98, 221030), (115, 188356), (124, 174685), (140, 154721), (155, 139748), (161, 134540), (196, 110515), (217, 99820), (230, 94178), (245, 88412), (310, 69874), (322, 67270), (434, 49910), (460, 47089), (490, 44206), (620, 34937), (644, 33635), (713, 30380), (805, 26908), (868, 24955), (961, 22540), (980, 22103), (1085, 19964), (1127, 19220), (1426, 15190), (1519, 14260), (1610, 13454), (1922, 11270), (2170, 9982), (2254, 9610), (2852, 7595), (3038, 7130), (3220, 6727), (3565, 6076), (3844, 5635), (4340, 4991), (4508, 4805)]