20989696

素因数分解:

$2^8\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1$

素因数の和:106

約数の個数: 144

約数和(自身を含む): 55629504

約数和(自身を除く): 34639808

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 17, 26, 28, 32, 34, 52, 53, 56, 64, 68, 91, 104, 106, 112, 119, 128, 136, 182, 208, 212, 221, 224, 238, 256, 272, 364, 371, 416, 424, 442, 448, 476, 544, 689, 728, 742, 832, 848, 884, 896, 901, 952, 1088, 1378, 1456, 1484, 1547, 1664, 1696, 1768, 1792, 1802, 1904, 2176, 2756, 2912, 2968, 3094, 3328, 3392, 3536, 3604, 3808, 4352, 4823, 5512, 5824, 5936, 6188, 6307, 6784, 7072, 7208, 7616, 9646, 11024, 11648, 11713, 11872, 12376, 12614, 13568, 14144, 14416, 15232, 19292, 22048, 23296, 23426, 23744, 24752, 25228, 28288, 28832, 30464, 38584, 44096, 46852, 47488, 49504, 50456, 56576, 57664, 77168, 81991, 88192, 93704, 94976, 99008, 100912, 115328, 154336, 163982, 176384, 187408, 198016, 201824, 230656, 308672, 327964, 374816, 396032, 403648, 617344, 655928, 749632, 807296, 1234688, 1311856, 1499264, 1614592, 2623712, 2998528, 5247424, 10494848, 20989696]

約数ペア:

[(1, 20989696), (2, 10494848), (4, 5247424), (7, 2998528), (8, 2623712), (13, 1614592), (14, 1499264), (16, 1311856), (17, 1234688), (26, 807296), (28, 749632), (32, 655928), (34, 617344), (52, 403648), (53, 396032), (56, 374816), (64, 327964), (68, 308672), (91, 230656), (104, 201824), (106, 198016), (112, 187408), (119, 176384), (128, 163982), (136, 154336), (182, 115328), (208, 100912), (212, 99008), (221, 94976), (224, 93704), (238, 88192), (256, 81991), (272, 77168), (364, 57664), (371, 56576), (416, 50456), (424, 49504), (442, 47488), (448, 46852), (476, 44096), (544, 38584), (689, 30464), (728, 28832), (742, 28288), (832, 25228), (848, 24752), (884, 23744), (896, 23426), (901, 23296), (952, 22048), (1088, 19292), (1378, 15232), (1456, 14416), (1484, 14144), (1547, 13568), (1664, 12614), (1696, 12376), (1768, 11872), (1792, 11713), (1802, 11648), (1904, 11024), (2176, 9646), (2756, 7616), (2912, 7208), (2968, 7072), (3094, 6784), (3328, 6307), (3392, 6188), (3536, 5936), (3604, 5824), (3808, 5512), (4352, 4823)]