20488156

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 20789444

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 89, 178, 233, 247, 356, 466, 494, 932, 988, 1157, 1691, 2314, 3029, 3382, 4427, 4628, 6058, 6764, 8854, 12116, 17708, 20737, 21983, 41474, 43966, 57551, 82948, 87932, 115102, 230204, 269581, 394003, 539162, 788006, 1078324, 1576012, 5122039, 10244078, 20488156]

約数ペア:

[(1, 20488156), (2, 10244078), (4, 5122039), (13, 1576012), (19, 1078324), (26, 788006), (38, 539162), (52, 394003), (76, 269581), (89, 230204), (178, 115102), (233, 87932), (247, 82948), (356, 57551), (466, 43966), (494, 41474), (932, 21983), (988, 20737), (1157, 17708), (1691, 12116), (2314, 8854), (3029, 6764), (3382, 6058), (4427, 4628)]