21513465

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 40492800

約数和(自身を除く): 18979335

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 59, 73, 111, 135, 177, 185, 219, 295, 333, 365, 531, 555, 657, 885, 999, 1095, 1593, 1665, 1971, 2183, 2655, 2701, 3285, 4307, 4995, 6549, 7965, 8103, 9855, 10915, 12921, 13505, 19647, 21535, 24309, 32745, 38763, 40515, 58941, 64605, 72927, 98235, 116289, 121545, 159359, 193815, 294705, 364635, 478077, 581445, 796795, 1434231, 2390385, 4302693, 7171155, 21513465]

約数ペア:

[(1, 21513465), (3, 7171155), (5, 4302693), (9, 2390385), (15, 1434231), (27, 796795), (37, 581445), (45, 478077), (59, 364635), (73, 294705), (111, 193815), (135, 159359), (177, 121545), (185, 116289), (219, 98235), (295, 72927), (333, 64605), (365, 58941), (531, 40515), (555, 38763), (657, 32745), (885, 24309), (999, 21535), (1095, 19647), (1593, 13505), (1665, 12921), (1971, 10915), (2183, 9855), (2655, 8103), (2701, 7965), (3285, 6549), (4307, 4995)]