21682778

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{193}}^1$

素因数の和:386

約数の個数: 32

約数和(自身を含む): 36666000

約数和(自身を除く): 14983222

約数列:

[1, 2, 13, 26, 29, 58, 149, 193, 298, 377, 386, 754, 1937, 2509, 3874, 4321, 5018, 5597, 8642, 11194, 28757, 56173, 57514, 72761, 112346, 145522, 373841, 747682, 833953, 1667906, 10841389, 21682778]

約数ペア:

[(1, 21682778), (2, 10841389), (13, 1667906), (26, 833953), (29, 747682), (58, 373841), (149, 145522), (193, 112346), (298, 72761), (377, 57514), (386, 56173), (754, 28757), (1937, 11194), (2509, 8642), (3874, 5597), (4321, 5018)]