21505484

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:207

約数の個数: 96

約数和(自身を含む): 52157952

約数和(自身を除く): 30652468

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 41, 44, 52, 77, 82, 91, 131, 143, 154, 164, 182, 262, 286, 287, 308, 364, 451, 524, 533, 572, 574, 902, 917, 1001, 1066, 1148, 1441, 1703, 1804, 1834, 2002, 2132, 2882, 3157, 3406, 3668, 3731, 4004, 5371, 5764, 5863, 6314, 6812, 7462, 10087, 10742, 11726, 11921, 12628, 14924, 18733, 20174, 21484, 23452, 23842, 37466, 37597, 40348, 41041, 47684, 59081, 69823, 74932, 75194, 82082, 118162, 131131, 139646, 150388, 164164, 236324, 262262, 279292, 413567, 488761, 524524, 768053, 827134, 977522, 1536106, 1654268, 1955044, 3072212, 5376371, 10752742, 21505484]

約数ペア:

[(1, 21505484), (2, 10752742), (4, 5376371), (7, 3072212), (11, 1955044), (13, 1654268), (14, 1536106), (22, 977522), (26, 827134), (28, 768053), (41, 524524), (44, 488761), (52, 413567), (77, 279292), (82, 262262), (91, 236324), (131, 164164), (143, 150388), (154, 139646), (164, 131131), (182, 118162), (262, 82082), (286, 75194), (287, 74932), (308, 69823), (364, 59081), (451, 47684), (524, 41041), (533, 40348), (572, 37597), (574, 37466), (902, 23842), (917, 23452), (1001, 21484), (1066, 20174), (1148, 18733), (1441, 14924), (1703, 12628), (1804, 11921), (1834, 11726), (2002, 10742), (2132, 10087), (2882, 7462), (3157, 6812), (3406, 6314), (3668, 5863), (3731, 5764), (4004, 5371)]