20771476

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 41247360

約数和(自身を除く): 20475884

約数列:

[1, 2, 4, 11, 22, 44, 61, 71, 109, 122, 142, 218, 244, 284, 436, 671, 781, 1199, 1342, 1562, 2398, 2684, 3124, 4331, 4796, 6649, 7739, 8662, 13298, 15478, 17324, 26596, 30956, 47641, 73139, 85129, 95282, 146278, 170258, 190564, 292556, 340516, 472079, 944158, 1888316, 5192869, 10385738, 20771476]

約数ペア:

[(1, 20771476), (2, 10385738), (4, 5192869), (11, 1888316), (22, 944158), (44, 472079), (61, 340516), (71, 292556), (109, 190564), (122, 170258), (142, 146278), (218, 95282), (244, 85129), (284, 73139), (436, 47641), (671, 30956), (781, 26596), (1199, 17324), (1342, 15478), (1562, 13298), (2398, 8662), (2684, 7739), (3124, 6649), (4331, 4796)]