21318707788

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{144667}}^1$

素因数の和:144974

約数の個数: 48

約数和(自身を含む): 45043828480

約数和(自身を除く): 23725120692

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 277, 532, 554, 1108, 1939, 3878, 5263, 7756, 10526, 21052, 36841, 73682, 144667, 147364, 289334, 578668, 1012669, 2025338, 2748673, 4050676, 5497346, 10994692, 19240711, 38481422, 40072759, 76962844, 80145518, 160291036, 280509313, 561018626, 761382421, 1122037252, 1522764842, 3045529684, 5329676947, 10659353894, 21318707788]

約数ペア:

[(1, 21318707788), (2, 10659353894), (4, 5329676947), (7, 3045529684), (14, 1522764842), (19, 1122037252), (28, 761382421), (38, 561018626), (76, 280509313), (133, 160291036), (266, 80145518), (277, 76962844), (532, 40072759), (554, 38481422), (1108, 19240711), (1939, 10994692), (3878, 5497346), (5263, 4050676), (7756, 2748673), (10526, 2025338), (21052, 1012669), (36841, 578668), (73682, 289334), (144667, 147364)]