21178404

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^2\times {\mathrm{59}}^2$

素因数の和:154

約数の個数: 81

約数和(自身を含む): 58968273

約数和(自身を除く): 37789869

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 59, 78, 117, 118, 156, 169, 177, 234, 236, 338, 354, 468, 507, 531, 676, 708, 767, 1014, 1062, 1521, 1534, 2028, 2124, 2301, 3042, 3068, 3481, 4602, 6084, 6903, 6962, 9204, 9971, 10443, 13806, 13924, 19942, 20886, 27612, 29913, 31329, 39884, 41772, 45253, 59826, 62658, 89739, 90506, 119652, 125316, 135759, 179478, 181012, 271518, 358956, 407277, 543036, 588289, 814554, 1176578, 1629108, 1764867, 2353156, 3529734, 5294601, 7059468, 10589202, 21178404]

約数ペア:

[(1, 21178404), (2, 10589202), (3, 7059468), (4, 5294601), (6, 3529734), (9, 2353156), (12, 1764867), (13, 1629108), (18, 1176578), (26, 814554), (36, 588289), (39, 543036), (52, 407277), (59, 358956), (78, 271518), (117, 181012), (118, 179478), (156, 135759), (169, 125316), (177, 119652), (234, 90506), (236, 89739), (338, 62658), (354, 59826), (468, 45253), (507, 41772), (531, 39884), (676, 31329), (708, 29913), (767, 27612), (1014, 20886), (1062, 19942), (1521, 13924), (1534, 13806), (2028, 10443), (2124, 9971), (2301, 9204), (3042, 6962), (3068, 6903), (3481, 6084)]