18978232

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:356

約数の個数: 64

約数和(自身を含む): 44352000

約数和(自身を除く): 25373768

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 131, 182, 199, 262, 364, 398, 524, 728, 796, 917, 1048, 1393, 1592, 1703, 1834, 2587, 2786, 3406, 3668, 5174, 5572, 6812, 7336, 10348, 11144, 11921, 13624, 18109, 20696, 23842, 26069, 36218, 47684, 52138, 72436, 95368, 104276, 144872, 182483, 208552, 338897, 364966, 677794, 729932, 1355588, 1459864, 2372279, 2711176, 4744558, 9489116, 18978232]

約数ペア:

[(1, 18978232), (2, 9489116), (4, 4744558), (7, 2711176), (8, 2372279), (13, 1459864), (14, 1355588), (26, 729932), (28, 677794), (52, 364966), (56, 338897), (91, 208552), (104, 182483), (131, 144872), (182, 104276), (199, 95368), (262, 72436), (364, 52138), (398, 47684), (524, 36218), (728, 26069), (796, 23842), (917, 20696), (1048, 18109), (1393, 13624), (1592, 11921), (1703, 11144), (1834, 10348), (2587, 7336), (2786, 6812), (3406, 5572), (3668, 5174)]