20402778

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^2\times {\mathrm{157}}^1\times {\mathrm{179}}^1$

素因数の和:363

約数の個数: 48

約数和(自身を含む): 45390240

約数和(自身を除く): 24987462

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 121, 157, 179, 242, 314, 358, 363, 471, 537, 726, 942, 1074, 1727, 1969, 3454, 3938, 5181, 5907, 10362, 11814, 18997, 21659, 28103, 37994, 43318, 56206, 56991, 64977, 84309, 113982, 129954, 168618, 309133, 618266, 927399, 1854798, 3400463, 6800926, 10201389, 20402778]

約数ペア:

[(1, 20402778), (2, 10201389), (3, 6800926), (6, 3400463), (11, 1854798), (22, 927399), (33, 618266), (66, 309133), (121, 168618), (157, 129954), (179, 113982), (242, 84309), (314, 64977), (358, 56991), (363, 56206), (471, 43318), (537, 37994), (726, 28103), (942, 21659), (1074, 18997), (1727, 11814), (1969, 10362), (3454, 5907), (3938, 5181)]