21620109

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{271}}^1$

素因数の和:441

約数の個数: 32

約数和(自身を含む): 34467840

約数和(自身を除く): 12847731

約数列:

[1, 3, 7, 21, 29, 87, 131, 203, 271, 393, 609, 813, 917, 1897, 2751, 3799, 5691, 7859, 11397, 23577, 26593, 35501, 55013, 79779, 106503, 165039, 248507, 745521, 1029529, 3088587, 7206703, 21620109]

約数ペア:

[(1, 21620109), (3, 7206703), (7, 3088587), (21, 1029529), (29, 745521), (87, 248507), (131, 165039), (203, 106503), (271, 79779), (393, 55013), (609, 35501), (813, 26593), (917, 23577), (1897, 11397), (2751, 7859), (3799, 5691)]