21739280

素因数分解:

$2^4\times 5^1\times {\mathrm{439}}^1\times {\mathrm{619}}^1$

素因数の和:1071

約数の個数: 40

約数和(自身を含む): 50740800

約数和(自身を除く): 29001520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 439, 619, 878, 1238, 1756, 2195, 2476, 3095, 3512, 4390, 4952, 6190, 7024, 8780, 9904, 12380, 17560, 24760, 35120, 49520, 271741, 543482, 1086964, 1358705, 2173928, 2717410, 4347856, 5434820, 10869640, 21739280]

約数ペア:

[(1, 21739280), (2, 10869640), (4, 5434820), (5, 4347856), (8, 2717410), (10, 2173928), (16, 1358705), (20, 1086964), (40, 543482), (80, 271741), (439, 49520), (619, 35120), (878, 24760), (1238, 17560), (1756, 12380), (2195, 9904), (2476, 8780), (3095, 7024), (3512, 6190), (4390, 4952)]