19938928

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{397}}^1$

素因数の和:521

約数の個数: 40

約数和(自身を含む): 40172528

約数和(自身を除く): 20233600

約数列:

[1, 2, 4, 8, 16, 43, 73, 86, 146, 172, 292, 344, 397, 584, 688, 794, 1168, 1588, 3139, 3176, 6278, 6352, 12556, 17071, 25112, 28981, 34142, 50224, 57962, 68284, 115924, 136568, 231848, 273136, 463696, 1246183, 2492366, 4984732, 9969464, 19938928]

約数ペア:

[(1, 19938928), (2, 9969464), (4, 4984732), (8, 2492366), (16, 1246183), (43, 463696), (73, 273136), (86, 231848), (146, 136568), (172, 115924), (292, 68284), (344, 57962), (397, 50224), (584, 34142), (688, 28981), (794, 25112), (1168, 17071), (1588, 12556), (3139, 6352), (3176, 6278)]