21581084

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 47566848

約数和(自身を除く): 25985764

約数列:

[1, 2, 4, 7, 14, 23, 28, 31, 46, 47, 62, 92, 94, 124, 161, 188, 217, 322, 329, 434, 529, 644, 658, 713, 868, 1058, 1081, 1316, 1426, 1457, 2116, 2162, 2852, 2914, 3703, 4324, 4991, 5828, 7406, 7567, 9982, 10199, 14812, 15134, 16399, 19964, 20398, 24863, 30268, 32798, 33511, 40796, 49726, 65596, 67022, 99452, 114793, 134044, 174041, 229586, 234577, 348082, 459172, 469154, 696164, 770753, 938308, 1541506, 3083012, 5395271, 10790542, 21581084]

約数ペア:

[(1, 21581084), (2, 10790542), (4, 5395271), (7, 3083012), (14, 1541506), (23, 938308), (28, 770753), (31, 696164), (46, 469154), (47, 459172), (62, 348082), (92, 234577), (94, 229586), (124, 174041), (161, 134044), (188, 114793), (217, 99452), (322, 67022), (329, 65596), (434, 49726), (529, 40796), (644, 33511), (658, 32798), (713, 30268), (868, 24863), (1058, 20398), (1081, 19964), (1316, 16399), (1426, 15134), (1457, 14812), (2116, 10199), (2162, 9982), (2852, 7567), (2914, 7406), (3703, 5828), (4324, 4991)]