21050328

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:161

約数の個数: 128

約数和(自身を含む): 61689600

約数和(自身を除く): 40639272

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 19, 24, 26, 38, 39, 52, 53, 57, 67, 76, 78, 104, 106, 114, 134, 152, 156, 159, 201, 212, 228, 247, 268, 312, 318, 402, 424, 456, 494, 536, 636, 689, 741, 804, 871, 988, 1007, 1272, 1273, 1378, 1482, 1608, 1742, 1976, 2014, 2067, 2546, 2613, 2756, 2964, 3021, 3484, 3551, 3819, 4028, 4134, 5092, 5226, 5512, 5928, 6042, 6968, 7102, 7638, 8056, 8268, 10184, 10452, 10653, 12084, 13091, 14204, 15276, 16536, 16549, 20904, 21306, 24168, 26182, 28408, 30552, 33098, 39273, 42612, 46163, 49647, 52364, 66196, 67469, 78546, 85224, 92326, 99294, 104728, 132392, 134938, 138489, 157092, 184652, 198588, 202407, 269876, 276978, 314184, 369304, 397176, 404814, 539752, 553956, 809628, 877097, 1107912, 1619256, 1754194, 2631291, 3508388, 5262582, 7016776, 10525164, 21050328]

約数ペア:

[(1, 21050328), (2, 10525164), (3, 7016776), (4, 5262582), (6, 3508388), (8, 2631291), (12, 1754194), (13, 1619256), (19, 1107912), (24, 877097), (26, 809628), (38, 553956), (39, 539752), (52, 404814), (53, 397176), (57, 369304), (67, 314184), (76, 276978), (78, 269876), (104, 202407), (106, 198588), (114, 184652), (134, 157092), (152, 138489), (156, 134938), (159, 132392), (201, 104728), (212, 99294), (228, 92326), (247, 85224), (268, 78546), (312, 67469), (318, 66196), (402, 52364), (424, 49647), (456, 46163), (494, 42612), (536, 39273), (636, 33098), (689, 30552), (741, 28408), (804, 26182), (871, 24168), (988, 21306), (1007, 20904), (1272, 16549), (1273, 16536), (1378, 15276), (1482, 14204), (1608, 13091), (1742, 12084), (1976, 10653), (2014, 10452), (2067, 10184), (2546, 8268), (2613, 8056), (2756, 7638), (2964, 7102), (3021, 6968), (3484, 6042), (3551, 5928), (3819, 5512), (4028, 5226), (4134, 5092)]