21997612

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{271}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 47767552

約数和(自身を除く): 25769940

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 223, 271, 364, 446, 542, 892, 1084, 1561, 1897, 2899, 3122, 3523, 3794, 5798, 6244, 7046, 7588, 11596, 14092, 20293, 24661, 40586, 49322, 60433, 81172, 98644, 120866, 241732, 423031, 785629, 846062, 1571258, 1692124, 3142516, 5499403, 10998806, 21997612]

約数ペア:

[(1, 21997612), (2, 10998806), (4, 5499403), (7, 3142516), (13, 1692124), (14, 1571258), (26, 846062), (28, 785629), (52, 423031), (91, 241732), (182, 120866), (223, 98644), (271, 81172), (364, 60433), (446, 49322), (542, 40586), (892, 24661), (1084, 20293), (1561, 14092), (1897, 11596), (2899, 7588), (3122, 7046), (3523, 6244), (3794, 5798)]