20784556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 41826400

約数和(自身を除く): 21041844

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 109, 193, 218, 247, 386, 436, 494, 772, 988, 1417, 2071, 2509, 2834, 3667, 4142, 5018, 5668, 7334, 8284, 10036, 14668, 21037, 26923, 42074, 47671, 53846, 84148, 95342, 107692, 190684, 273481, 399703, 546962, 799406, 1093924, 1598812, 5196139, 10392278, 20784556]

約数ペア:

[(1, 20784556), (2, 10392278), (4, 5196139), (13, 1598812), (19, 1093924), (26, 799406), (38, 546962), (52, 399703), (76, 273481), (109, 190684), (193, 107692), (218, 95342), (247, 84148), (386, 53846), (436, 47671), (494, 42074), (772, 26923), (988, 21037), (1417, 14668), (2071, 10036), (2509, 8284), (2834, 7334), (3667, 5668), (4142, 5018)]