19915216

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{373}}^1$

素因数の和:499

約数の個数: 40

約数和(自身を含む): 40068864

約数和(自身を除く): 20153648

約数列:

[1, 2, 4, 8, 16, 47, 71, 94, 142, 188, 284, 373, 376, 568, 746, 752, 1136, 1492, 2984, 3337, 5968, 6674, 13348, 17531, 26483, 26696, 35062, 52966, 53392, 70124, 105932, 140248, 211864, 280496, 423728, 1244701, 2489402, 4978804, 9957608, 19915216]

約数ペア:

[(1, 19915216), (2, 9957608), (4, 4978804), (8, 2489402), (16, 1244701), (47, 423728), (71, 280496), (94, 211864), (142, 140248), (188, 105932), (284, 70124), (373, 53392), (376, 52966), (568, 35062), (746, 26696), (752, 26483), (1136, 17531), (1492, 13348), (2984, 6674), (3337, 5968)]