21507516

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{311}}^1$

素因数の和:451

約数の個数: 72

約数和(自身を含む): 58260384

約数和(自身を除く): 36752868

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 68, 102, 113, 153, 204, 226, 306, 311, 339, 452, 612, 622, 678, 933, 1017, 1244, 1356, 1866, 1921, 2034, 2799, 3732, 3842, 4068, 5287, 5598, 5763, 7684, 10574, 11196, 11526, 15861, 17289, 21148, 23052, 31722, 34578, 35143, 47583, 63444, 69156, 70286, 95166, 105429, 140572, 190332, 210858, 316287, 421716, 597431, 632574, 1194862, 1265148, 1792293, 2389724, 3584586, 5376879, 7169172, 10753758, 21507516]

約数ペア:

[(1, 21507516), (2, 10753758), (3, 7169172), (4, 5376879), (6, 3584586), (9, 2389724), (12, 1792293), (17, 1265148), (18, 1194862), (34, 632574), (36, 597431), (51, 421716), (68, 316287), (102, 210858), (113, 190332), (153, 140572), (204, 105429), (226, 95166), (306, 70286), (311, 69156), (339, 63444), (452, 47583), (612, 35143), (622, 34578), (678, 31722), (933, 23052), (1017, 21148), (1244, 17289), (1356, 15861), (1866, 11526), (1921, 11196), (2034, 10574), (2799, 7684), (3732, 5763), (3842, 5598), (4068, 5287)]