21478548

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1$

素因数の和:146

約数の個数: 144

約数和(自身を含む): 66407040

約数和(自身を除く): 44928492

約数列:

[1, 2, 3, 4, 6, 7, 12, 13, 14, 17, 21, 26, 28, 34, 39, 42, 51, 52, 68, 78, 84, 89, 91, 102, 119, 156, 169, 178, 182, 204, 221, 238, 267, 273, 338, 356, 357, 364, 442, 476, 507, 534, 546, 623, 663, 676, 714, 884, 1014, 1068, 1092, 1157, 1183, 1246, 1326, 1428, 1513, 1547, 1869, 2028, 2314, 2366, 2492, 2652, 2873, 3026, 3094, 3471, 3549, 3738, 4539, 4628, 4641, 4732, 5746, 6052, 6188, 6942, 7098, 7476, 8099, 8619, 9078, 9282, 10591, 11492, 13884, 14196, 15041, 16198, 17238, 18156, 18564, 19669, 20111, 21182, 24297, 30082, 31773, 32396, 34476, 39338, 40222, 42364, 45123, 48594, 59007, 60164, 60333, 63546, 78676, 80444, 90246, 97188, 105287, 118014, 120666, 127092, 137683, 180492, 210574, 236028, 241332, 255697, 275366, 315861, 413049, 421148, 511394, 550732, 631722, 767091, 826098, 1022788, 1263444, 1534182, 1652196, 1789879, 3068364, 3579758, 5369637, 7159516, 10739274, 21478548]

約数ペア:

[(1, 21478548), (2, 10739274), (3, 7159516), (4, 5369637), (6, 3579758), (7, 3068364), (12, 1789879), (13, 1652196), (14, 1534182), (17, 1263444), (21, 1022788), (26, 826098), (28, 767091), (34, 631722), (39, 550732), (42, 511394), (51, 421148), (52, 413049), (68, 315861), (78, 275366), (84, 255697), (89, 241332), (91, 236028), (102, 210574), (119, 180492), (156, 137683), (169, 127092), (178, 120666), (182, 118014), (204, 105287), (221, 97188), (238, 90246), (267, 80444), (273, 78676), (338, 63546), (356, 60333), (357, 60164), (364, 59007), (442, 48594), (476, 45123), (507, 42364), (534, 40222), (546, 39338), (623, 34476), (663, 32396), (676, 31773), (714, 30082), (884, 24297), (1014, 21182), (1068, 20111), (1092, 19669), (1157, 18564), (1183, 18156), (1246, 17238), (1326, 16198), (1428, 15041), (1513, 14196), (1547, 13884), (1869, 11492), (2028, 10591), (2314, 9282), (2366, 9078), (2492, 8619), (2652, 8099), (2873, 7476), (3026, 7098), (3094, 6942), (3471, 6188), (3549, 6052), (3738, 5746), (4539, 4732), (4628, 4641)]