21071456

素因数分解:

$2^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4951}}^1$

素因数の和:4987

約数の個数: 48

約数和(自身を含む): 49916160

約数和(自身を除く): 28844704

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 76, 112, 133, 152, 224, 266, 304, 532, 608, 1064, 2128, 4256, 4951, 9902, 19804, 34657, 39608, 69314, 79216, 94069, 138628, 158432, 188138, 277256, 376276, 554512, 658483, 752552, 1109024, 1316966, 1505104, 2633932, 3010208, 5267864, 10535728, 21071456]

約数ペア:

[(1, 21071456), (2, 10535728), (4, 5267864), (7, 3010208), (8, 2633932), (14, 1505104), (16, 1316966), (19, 1109024), (28, 752552), (32, 658483), (38, 554512), (56, 376276), (76, 277256), (112, 188138), (133, 158432), (152, 138628), (224, 94069), (266, 79216), (304, 69314), (532, 39608), (608, 34657), (1064, 19804), (2128, 9902), (4256, 4951)]