21791360

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:529

約数の個数: 64

約数和(自身を含む): 52876800

約数和(自身を除く): 31085440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 431, 632, 640, 790, 862, 1264, 1580, 1724, 2155, 2528, 3160, 3448, 4310, 5056, 6320, 6896, 8620, 10112, 12640, 13792, 17240, 25280, 27584, 34049, 34480, 50560, 55168, 68098, 68960, 136196, 137920, 170245, 272392, 275840, 340490, 544784, 680980, 1089568, 1361960, 2179136, 2723920, 4358272, 5447840, 10895680, 21791360]

約数ペア:

[(1, 21791360), (2, 10895680), (4, 5447840), (5, 4358272), (8, 2723920), (10, 2179136), (16, 1361960), (20, 1089568), (32, 680980), (40, 544784), (64, 340490), (79, 275840), (80, 272392), (128, 170245), (158, 137920), (160, 136196), (316, 68960), (320, 68098), (395, 55168), (431, 50560), (632, 34480), (640, 34049), (790, 27584), (862, 25280), (1264, 17240), (1580, 13792), (1724, 12640), (2155, 10112), (2528, 8620), (3160, 6896), (3448, 6320), (4310, 5056)]