21211505

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{191}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9754255

約数列:

[1, 5, 7, 19, 35, 95, 133, 167, 191, 665, 835, 955, 1169, 1337, 3173, 3629, 5845, 6685, 15865, 18145, 22211, 25403, 31897, 111055, 127015, 159485, 223279, 606043, 1116395, 3030215, 4242301, 21211505]

約数ペア:

[(1, 21211505), (5, 4242301), (7, 3030215), (19, 1116395), (35, 606043), (95, 223279), (133, 159485), (167, 127015), (191, 111055), (665, 31897), (835, 25403), (955, 22211), (1169, 18145), (1337, 15865), (3173, 6685), (3629, 5845)]