21449428

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{487}}^1$

素因数の和:533

約数の個数: 72

約数和(自身を含む): 50884736

約数和(自身を除く): 29435308

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 121, 143, 154, 182, 242, 286, 308, 364, 484, 487, 572, 847, 974, 1001, 1573, 1694, 1948, 2002, 3146, 3388, 3409, 4004, 5357, 6292, 6331, 6818, 10714, 11011, 12662, 13636, 21428, 22022, 25324, 37499, 44044, 44317, 58927, 69641, 74998, 88634, 117854, 139282, 149996, 177268, 235708, 278564, 412489, 487487, 766051, 824978, 974974, 1532102, 1649956, 1949948, 3064204, 5362357, 10724714, 21449428]

約数ペア:

[(1, 21449428), (2, 10724714), (4, 5362357), (7, 3064204), (11, 1949948), (13, 1649956), (14, 1532102), (22, 974974), (26, 824978), (28, 766051), (44, 487487), (52, 412489), (77, 278564), (91, 235708), (121, 177268), (143, 149996), (154, 139282), (182, 117854), (242, 88634), (286, 74998), (308, 69641), (364, 58927), (484, 44317), (487, 44044), (572, 37499), (847, 25324), (974, 22022), (1001, 21428), (1573, 13636), (1694, 12662), (1948, 11011), (2002, 10714), (3146, 6818), (3388, 6331), (3409, 6292), (4004, 5357)]