21637808

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{653}}^1$

素因数の和:789

約数の個数: 40

約数和(自身を含む): 44602800

約数和(自身を除く): 22964992

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 109, 152, 218, 304, 436, 653, 872, 1306, 1744, 2071, 2612, 4142, 5224, 8284, 10448, 12407, 16568, 24814, 33136, 49628, 71177, 99256, 142354, 198512, 284708, 569416, 1138832, 1352363, 2704726, 5409452, 10818904, 21637808]

約数ペア:

[(1, 21637808), (2, 10818904), (4, 5409452), (8, 2704726), (16, 1352363), (19, 1138832), (38, 569416), (76, 284708), (109, 198512), (152, 142354), (218, 99256), (304, 71177), (436, 49628), (653, 33136), (872, 24814), (1306, 16568), (1744, 12407), (2071, 10448), (2612, 8284), (4142, 5224)]