21995388

素因数分解:

$2^2\times 3^6\times {\mathrm{19}}^1\times {\mathrm{397}}^1$

素因数の和:438

約数の個数: 84

約数和(自身を含む): 60901960

約数和(自身を除く): 38906572

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 27, 36, 38, 54, 57, 76, 81, 108, 114, 162, 171, 228, 243, 324, 342, 397, 486, 513, 684, 729, 794, 972, 1026, 1191, 1458, 1539, 1588, 2052, 2382, 2916, 3078, 3573, 4617, 4764, 6156, 7146, 7543, 9234, 10719, 13851, 14292, 15086, 18468, 21438, 22629, 27702, 30172, 32157, 42876, 45258, 55404, 64314, 67887, 90516, 96471, 128628, 135774, 192942, 203661, 271548, 289413, 385884, 407322, 578826, 610983, 814644, 1157652, 1221966, 1832949, 2443932, 3665898, 5498847, 7331796, 10997694, 21995388]

約数ペア:

[(1, 21995388), (2, 10997694), (3, 7331796), (4, 5498847), (6, 3665898), (9, 2443932), (12, 1832949), (18, 1221966), (19, 1157652), (27, 814644), (36, 610983), (38, 578826), (54, 407322), (57, 385884), (76, 289413), (81, 271548), (108, 203661), (114, 192942), (162, 135774), (171, 128628), (228, 96471), (243, 90516), (324, 67887), (342, 64314), (397, 55404), (486, 45258), (513, 42876), (684, 32157), (729, 30172), (794, 27702), (972, 22629), (1026, 21438), (1191, 18468), (1458, 15086), (1539, 14292), (1588, 13851), (2052, 10719), (2382, 9234), (2916, 7543), (3078, 7146), (3573, 6156), (4617, 4764)]