21115878

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{563}}^1$

素因数の和:641

約数の個数: 64

約数和(自身を含む): 51978240

約数和(自身を除く): 30862362

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 47, 57, 94, 114, 133, 141, 266, 282, 329, 399, 563, 658, 798, 893, 987, 1126, 1689, 1786, 1974, 2679, 3378, 3941, 5358, 6251, 7882, 10697, 11823, 12502, 18753, 21394, 23646, 26461, 32091, 37506, 52922, 64182, 74879, 79383, 149758, 158766, 185227, 224637, 370454, 449274, 502759, 555681, 1005518, 1111362, 1508277, 3016554, 3519313, 7038626, 10557939, 21115878]

約数ペア:

[(1, 21115878), (2, 10557939), (3, 7038626), (6, 3519313), (7, 3016554), (14, 1508277), (19, 1111362), (21, 1005518), (38, 555681), (42, 502759), (47, 449274), (57, 370454), (94, 224637), (114, 185227), (133, 158766), (141, 149758), (266, 79383), (282, 74879), (329, 64182), (399, 52922), (563, 37506), (658, 32091), (798, 26461), (893, 23646), (987, 21394), (1126, 18753), (1689, 12502), (1786, 11823), (1974, 10697), (2679, 7882), (3378, 6251), (3941, 5358)]