405860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 1053696

約数和(自身を除く): 647836

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 223, 260, 364, 446, 455, 892, 910, 1115, 1561, 1820, 2230, 2899, 3122, 4460, 5798, 6244, 7805, 11596, 14495, 15610, 20293, 28990, 31220, 40586, 57980, 81172, 101465, 202930, 405860]

約数ペア:

[(1, 405860), (2, 202930), (4, 101465), (5, 81172), (7, 57980), (10, 40586), (13, 31220), (14, 28990), (20, 20293), (26, 15610), (28, 14495), (35, 11596), (52, 7805), (65, 6244), (70, 5798), (91, 4460), (130, 3122), (140, 2899), (182, 2230), (223, 1820), (260, 1561), (364, 1115), (446, 910), (455, 892)]