21085136

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1613}}^1$

素因数の和:1683

約数の個数: 40

約数和(自身を含む): 44029920

約数和(自身を除く): 22944784

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1613, 1634, 3226, 3268, 6452, 6536, 12904, 13072, 25808, 30647, 61294, 69359, 122588, 138718, 245176, 277436, 490352, 554872, 1109744, 1317821, 2635642, 5271284, 10542568, 21085136]

約数ペア:

[(1, 21085136), (2, 10542568), (4, 5271284), (8, 2635642), (16, 1317821), (19, 1109744), (38, 554872), (43, 490352), (76, 277436), (86, 245176), (152, 138718), (172, 122588), (304, 69359), (344, 61294), (688, 30647), (817, 25808), (1613, 13072), (1634, 12904), (3226, 6536), (3268, 6452)]