21016125

素因数分解:

$3^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{479}}^1$

素因数の和:516

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 20916675

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 117, 125, 135, 195, 225, 325, 351, 375, 479, 585, 675, 975, 1125, 1437, 1625, 1755, 2395, 2925, 3375, 4311, 4875, 6227, 7185, 8775, 11975, 12933, 14625, 18681, 21555, 31135, 35925, 43875, 56043, 59875, 64665, 93405, 107775, 155675, 168129, 179625, 280215, 323325, 467025, 538875, 778375, 840645, 1401075, 1616625, 2335125, 4203225, 7005375, 21016125]

約数ペア:

[(1, 21016125), (3, 7005375), (5, 4203225), (9, 2335125), (13, 1616625), (15, 1401075), (25, 840645), (27, 778375), (39, 538875), (45, 467025), (65, 323325), (75, 280215), (117, 179625), (125, 168129), (135, 155675), (195, 107775), (225, 93405), (325, 64665), (351, 59875), (375, 56043), (479, 43875), (585, 35925), (675, 31135), (975, 21555), (1125, 18681), (1437, 14625), (1625, 12933), (1755, 11975), (2395, 8775), (2925, 7185), (3375, 6227), (4311, 4875)]