21980530

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{809}}^1$

素因数の和:859

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 27008270

約数列:

[1, 2, 5, 10, 11, 13, 19, 22, 26, 38, 55, 65, 95, 110, 130, 143, 190, 209, 247, 286, 418, 494, 715, 809, 1045, 1235, 1430, 1618, 2090, 2470, 2717, 4045, 5434, 8090, 8899, 10517, 13585, 15371, 17798, 21034, 27170, 30742, 44495, 52585, 76855, 88990, 105170, 115687, 153710, 169081, 199823, 231374, 338162, 399646, 578435, 845405, 999115, 1156870, 1690810, 1998230, 2198053, 4396106, 10990265, 21980530]

約数ペア:

[(1, 21980530), (2, 10990265), (5, 4396106), (10, 2198053), (11, 1998230), (13, 1690810), (19, 1156870), (22, 999115), (26, 845405), (38, 578435), (55, 399646), (65, 338162), (95, 231374), (110, 199823), (130, 169081), (143, 153710), (190, 115687), (209, 105170), (247, 88990), (286, 76855), (418, 52585), (494, 44495), (715, 30742), (809, 27170), (1045, 21034), (1235, 17798), (1430, 15371), (1618, 13585), (2090, 10517), (2470, 8899), (2717, 8090), (4045, 5434)]