21781995

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{337}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 36341760

約数和(自身を除く): 14559765

約数列:

[1, 3, 5, 15, 31, 93, 139, 155, 337, 417, 465, 695, 1011, 1685, 2085, 4309, 5055, 10447, 12927, 21545, 31341, 46843, 52235, 64635, 140529, 156705, 234215, 702645, 1452133, 4356399, 7260665, 21781995]

約数ペア:

[(1, 21781995), (3, 7260665), (5, 4356399), (15, 1452133), (31, 702645), (93, 234215), (139, 156705), (155, 140529), (337, 64635), (417, 52235), (465, 46843), (695, 31341), (1011, 21545), (1685, 12927), (2085, 10447), (4309, 5055)]