21489840

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{9949}}^1$

素因数の和:9971

約数の個数: 80

約数和(自身を含む): 74028000

約数和(自身を除く): 52538160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 54, 60, 72, 80, 90, 108, 120, 135, 144, 180, 216, 240, 270, 360, 432, 540, 720, 1080, 2160, 9949, 19898, 29847, 39796, 49745, 59694, 79592, 89541, 99490, 119388, 149235, 159184, 179082, 198980, 238776, 268623, 298470, 358164, 397960, 447705, 477552, 537246, 596940, 716328, 795920, 895410, 1074492, 1193880, 1343115, 1432656, 1790820, 2148984, 2387760, 2686230, 3581640, 4297968, 5372460, 7163280, 10744920, 21489840]

約数ペア:

[(1, 21489840), (2, 10744920), (3, 7163280), (4, 5372460), (5, 4297968), (6, 3581640), (8, 2686230), (9, 2387760), (10, 2148984), (12, 1790820), (15, 1432656), (16, 1343115), (18, 1193880), (20, 1074492), (24, 895410), (27, 795920), (30, 716328), (36, 596940), (40, 537246), (45, 477552), (48, 447705), (54, 397960), (60, 358164), (72, 298470), (80, 268623), (90, 238776), (108, 198980), (120, 179082), (135, 159184), (144, 149235), (180, 119388), (216, 99490), (240, 89541), (270, 79592), (360, 59694), (432, 49745), (540, 39796), (720, 29847), (1080, 19898), (2160, 9949)]