19786564

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{269}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 41368320

約数和(自身を除く): 21581756

約数列:

[1, 2, 4, 7, 14, 28, 37, 71, 74, 142, 148, 259, 269, 284, 497, 518, 538, 994, 1036, 1076, 1883, 1988, 2627, 3766, 5254, 7532, 9953, 10508, 18389, 19099, 19906, 36778, 38198, 39812, 69671, 73556, 76396, 133693, 139342, 267386, 278684, 534772, 706663, 1413326, 2826652, 4946641, 9893282, 19786564]

約数ペア:

[(1, 19786564), (2, 9893282), (4, 4946641), (7, 2826652), (14, 1413326), (28, 706663), (37, 534772), (71, 278684), (74, 267386), (142, 139342), (148, 133693), (259, 76396), (269, 73556), (284, 69671), (497, 39812), (518, 38198), (538, 36778), (994, 19906), (1036, 19099), (1076, 18389), (1883, 10508), (1988, 9953), (2627, 7532), (3766, 5254)]