21430215

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 38958816

約数和(自身を除く): 17528601

約数列:

[1, 3, 5, 9, 15, 37, 45, 61, 111, 183, 185, 211, 305, 333, 549, 555, 633, 915, 1055, 1665, 1899, 2257, 2745, 3165, 6771, 7807, 9495, 11285, 12871, 20313, 23421, 33855, 38613, 39035, 64355, 70263, 101565, 115839, 117105, 193065, 351315, 476227, 579195, 1428681, 2381135, 4286043, 7143405, 21430215]

約数ペア:

[(1, 21430215), (3, 7143405), (5, 4286043), (9, 2381135), (15, 1428681), (37, 579195), (45, 476227), (61, 351315), (111, 193065), (183, 117105), (185, 115839), (211, 101565), (305, 70263), (333, 64355), (549, 39035), (555, 38613), (633, 33855), (915, 23421), (1055, 20313), (1665, 12871), (1899, 11285), (2257, 9495), (2745, 7807), (3165, 6771)]