21129472

素因数分解:

$2^8\times 7^1\times {\mathrm{13}}^1\times {\mathrm{907}}^1$

素因数の和:943

約数の個数: 72

約数和(自身を含む): 51966656

約数和(自身を除く): 30837184

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, 728, 832, 896, 907, 1456, 1664, 1792, 1814, 2912, 3328, 3628, 5824, 6349, 7256, 11648, 11791, 12698, 14512, 23296, 23582, 25396, 29024, 47164, 50792, 58048, 82537, 94328, 101584, 116096, 165074, 188656, 203168, 232192, 330148, 377312, 406336, 660296, 754624, 812672, 1320592, 1509248, 1625344, 2641184, 3018496, 5282368, 10564736, 21129472]

約数ペア:

[(1, 21129472), (2, 10564736), (4, 5282368), (7, 3018496), (8, 2641184), (13, 1625344), (14, 1509248), (16, 1320592), (26, 812672), (28, 754624), (32, 660296), (52, 406336), (56, 377312), (64, 330148), (91, 232192), (104, 203168), (112, 188656), (128, 165074), (182, 116096), (208, 101584), (224, 94328), (256, 82537), (364, 58048), (416, 50792), (448, 47164), (728, 29024), (832, 25396), (896, 23582), (907, 23296), (1456, 14512), (1664, 12698), (1792, 11791), (1814, 11648), (2912, 7256), (3328, 6349), (3628, 5824)]