21516677

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 27847680

約数和(自身を除く): 6331003

約数列:

[1, 7, 13, 41, 73, 79, 91, 287, 511, 533, 553, 949, 1027, 2993, 3239, 3731, 5767, 6643, 7189, 20951, 22673, 38909, 40369, 42107, 74971, 236447, 272363, 294749, 524797, 1655129, 3073811, 21516677]

約数ペア:

[(1, 21516677), (7, 3073811), (13, 1655129), (41, 524797), (73, 294749), (79, 272363), (91, 236447), (287, 74971), (511, 42107), (533, 40369), (553, 38909), (949, 22673), (1027, 20951), (2993, 7189), (3239, 6643), (3731, 5767)]