21477980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1949}}^1$

素因数の和:2006

約数の個数: 48

約数和(自身を含む): 49140000

約数和(自身を除く): 27662020

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 116, 145, 190, 290, 380, 551, 580, 1102, 1949, 2204, 2755, 3898, 5510, 7796, 9745, 11020, 19490, 37031, 38980, 56521, 74062, 113042, 148124, 185155, 226084, 282605, 370310, 565210, 740620, 1073899, 1130420, 2147798, 4295596, 5369495, 10738990, 21477980]

約数ペア:

[(1, 21477980), (2, 10738990), (4, 5369495), (5, 4295596), (10, 2147798), (19, 1130420), (20, 1073899), (29, 740620), (38, 565210), (58, 370310), (76, 282605), (95, 226084), (116, 185155), (145, 148124), (190, 113042), (290, 74062), (380, 56521), (551, 38980), (580, 37031), (1102, 19490), (1949, 11020), (2204, 9745), (2755, 7796), (3898, 5510)]