20211856568

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{509}}^1\times {\mathrm{1297}}^1$

素因数の和:1944

約数の個数: 64

約数和(自身を含む): 39321612000

約数和(自身を除く): 19109755432

約数列:

[1, 2, 4, 8, 43, 86, 89, 172, 178, 344, 356, 509, 712, 1018, 1297, 2036, 2594, 3827, 4072, 5188, 7654, 10376, 15308, 21887, 30616, 43774, 45301, 55771, 87548, 90602, 111542, 115433, 175096, 181204, 223084, 230866, 362408, 446168, 461732, 660173, 923464, 1320346, 1947943, 2640692, 3895886, 4963619, 5281384, 7791772, 9927238, 15583544, 19854476, 28387439, 39708952, 56774878, 58755397, 113549756, 117510794, 227099512, 235021588, 470043176, 2526482071, 5052964142, 10105928284, 20211856568]

約数ペア:

[(1, 20211856568), (2, 10105928284), (4, 5052964142), (8, 2526482071), (43, 470043176), (86, 235021588), (89, 227099512), (172, 117510794), (178, 113549756), (344, 58755397), (356, 56774878), (509, 39708952), (712, 28387439), (1018, 19854476), (1297, 15583544), (2036, 9927238), (2594, 7791772), (3827, 5281384), (4072, 4963619), (5188, 3895886), (7654, 2640692), (10376, 1947943), (15308, 1320346), (21887, 923464), (30616, 660173), (43774, 461732), (45301, 446168), (55771, 362408), (87548, 230866), (90602, 223084), (111542, 181204), (115433, 175096)]