21890223

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{601}}^1$

素因数の和:700

約数の個数: 32

約数和(自身を含む): 34675200

約数和(自身を除く): 12784977

約数列:

[1, 3, 9, 19, 27, 57, 71, 171, 213, 513, 601, 639, 1349, 1803, 1917, 4047, 5409, 11419, 12141, 16227, 34257, 36423, 42671, 102771, 128013, 308313, 384039, 810749, 1152117, 2432247, 7296741, 21890223]

約数ペア:

[(1, 21890223), (3, 7296741), (9, 2432247), (19, 1152117), (27, 810749), (57, 384039), (71, 308313), (171, 128013), (213, 102771), (513, 42671), (601, 36423), (639, 34257), (1349, 16227), (1803, 12141), (1917, 11419), (4047, 5409)]