21611240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{977}}^1$

素因数の和:1074

約数の個数: 64

約数和(自身を含む): 56332800

約数和(自身を除く): 34721560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 977, 1106, 1580, 1954, 2212, 2765, 3160, 3908, 4424, 4885, 5530, 6839, 7816, 9770, 11060, 13678, 19540, 22120, 27356, 34195, 39080, 54712, 68390, 77183, 136780, 154366, 273560, 308732, 385915, 540281, 617464, 771830, 1080562, 1543660, 2161124, 2701405, 3087320, 4322248, 5402810, 10805620, 21611240]

約数ペア:

[(1, 21611240), (2, 10805620), (4, 5402810), (5, 4322248), (7, 3087320), (8, 2701405), (10, 2161124), (14, 1543660), (20, 1080562), (28, 771830), (35, 617464), (40, 540281), (56, 385915), (70, 308732), (79, 273560), (140, 154366), (158, 136780), (280, 77183), (316, 68390), (395, 54712), (553, 39080), (632, 34195), (790, 27356), (977, 22120), (1106, 19540), (1580, 13678), (1954, 11060), (2212, 9770), (2765, 7816), (3160, 6839), (3908, 5530), (4424, 4885)]