21597280

素因数分解:

$2^5\times 5^1\times {\mathrm{347}}^1\times {\mathrm{389}}^1$

素因数の和:751

約数の個数: 48

約数和(自身を含む): 51302160

約数和(自身を除く): 29704880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 347, 389, 694, 778, 1388, 1556, 1735, 1945, 2776, 3112, 3470, 3890, 5552, 6224, 6940, 7780, 11104, 12448, 13880, 15560, 27760, 31120, 55520, 62240, 134983, 269966, 539932, 674915, 1079864, 1349830, 2159728, 2699660, 4319456, 5399320, 10798640, 21597280]

約数ペア:

[(1, 21597280), (2, 10798640), (4, 5399320), (5, 4319456), (8, 2699660), (10, 2159728), (16, 1349830), (20, 1079864), (32, 674915), (40, 539932), (80, 269966), (160, 134983), (347, 62240), (389, 55520), (694, 31120), (778, 27760), (1388, 15560), (1556, 13880), (1735, 12448), (1945, 11104), (2776, 7780), (3112, 6940), (3470, 6224), (3890, 5552)]