21478912

素因数分解:

$2^9\times 7^1\times {\mathrm{13}}^1\times {\mathrm{461}}^1$

素因数の和:499

約数の個数: 80

約数和(自身を含む): 52934112

約数和(自身を除く): 31455200

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 64, 91, 104, 112, 128, 182, 208, 224, 256, 364, 416, 448, 461, 512, 728, 832, 896, 922, 1456, 1664, 1792, 1844, 2912, 3227, 3328, 3584, 3688, 5824, 5993, 6454, 6656, 7376, 11648, 11986, 12908, 14752, 23296, 23972, 25816, 29504, 41951, 46592, 47944, 51632, 59008, 83902, 95888, 103264, 118016, 167804, 191776, 206528, 236032, 335608, 383552, 413056, 671216, 767104, 826112, 1342432, 1534208, 1652224, 2684864, 3068416, 5369728, 10739456, 21478912]

約数ペア:

[(1, 21478912), (2, 10739456), (4, 5369728), (7, 3068416), (8, 2684864), (13, 1652224), (14, 1534208), (16, 1342432), (26, 826112), (28, 767104), (32, 671216), (52, 413056), (56, 383552), (64, 335608), (91, 236032), (104, 206528), (112, 191776), (128, 167804), (182, 118016), (208, 103264), (224, 95888), (256, 83902), (364, 59008), (416, 51632), (448, 47944), (461, 46592), (512, 41951), (728, 29504), (832, 25816), (896, 23972), (922, 23296), (1456, 14752), (1664, 12908), (1792, 11986), (1844, 11648), (2912, 7376), (3227, 6656), (3328, 6454), (3584, 5993), (3688, 5824)]