21160528

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1481}}^1$

素因数の和:1555

約数の個数: 40

約数和(自身を含む): 44104320

約数和(自身を除く): 22943792

約数列:

[1, 2, 4, 8, 16, 19, 38, 47, 76, 94, 152, 188, 304, 376, 752, 893, 1481, 1786, 2962, 3572, 5924, 7144, 11848, 14288, 23696, 28139, 56278, 69607, 112556, 139214, 225112, 278428, 450224, 556856, 1113712, 1322533, 2645066, 5290132, 10580264, 21160528]

約数ペア:

[(1, 21160528), (2, 10580264), (4, 5290132), (8, 2645066), (16, 1322533), (19, 1113712), (38, 556856), (47, 450224), (76, 278428), (94, 225112), (152, 139214), (188, 112556), (304, 69607), (376, 56278), (752, 28139), (893, 23696), (1481, 14288), (1786, 11848), (2962, 7144), (3572, 5924)]