21000967216

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{633781}}^1$

素因数の和:633917

約数の個数: 40

約数和(自身を含む): 43223932400

約数和(自身を除く): 22222965184

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 109, 152, 218, 304, 436, 872, 1744, 2071, 4142, 8284, 16568, 33136, 633781, 1267562, 2535124, 5070248, 10140496, 12041839, 24083678, 48167356, 69082129, 96334712, 138164258, 192669424, 276328516, 552657032, 1105314064, 1312560451, 2625120902, 5250241804, 10500483608, 21000967216]

約数ペア:

[(1, 21000967216), (2, 10500483608), (4, 5250241804), (8, 2625120902), (16, 1312560451), (19, 1105314064), (38, 552657032), (76, 276328516), (109, 192669424), (152, 138164258), (218, 96334712), (304, 69082129), (436, 48167356), (872, 24083678), (1744, 12041839), (2071, 10140496), (4142, 5070248), (8284, 2535124), (16568, 1267562), (33136, 633781)]