21981919120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{39253427}}^1$

素因数の和:39253447

約数の個数: 40

約数和(自身を含む): 58409100864

約数和(自身を除く): 36427181744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 39253427, 78506854, 157013708, 196267135, 274773989, 314027416, 392534270, 549547978, 628054832, 785068540, 1099095956, 1373869945, 1570137080, 2198191912, 2747739890, 3140274160, 4396383824, 5495479780, 10990959560, 21981919120]

約数ペア:

[(1, 21981919120), (2, 10990959560), (4, 5495479780), (5, 4396383824), (7, 3140274160), (8, 2747739890), (10, 2198191912), (14, 1570137080), (16, 1373869945), (20, 1099095956), (28, 785068540), (35, 628054832), (40, 549547978), (56, 392534270), (70, 314027416), (80, 274773989), (112, 196267135), (140, 157013708), (280, 78506854), (560, 39253427)]