21487986

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{401}}^1$

素因数の和:651

約数の個数: 48

約数和(自身を含む): 50483160

約数和(自身を除く): 28995174

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 229, 234, 401, 458, 687, 802, 1203, 1374, 2061, 2406, 2977, 3609, 4122, 5213, 5954, 7218, 8931, 10426, 15639, 17862, 26793, 31278, 46917, 53586, 91829, 93834, 183658, 275487, 550974, 826461, 1193777, 1652922, 2387554, 3581331, 7162662, 10743993, 21487986]

約数ペア:

[(1, 21487986), (2, 10743993), (3, 7162662), (6, 3581331), (9, 2387554), (13, 1652922), (18, 1193777), (26, 826461), (39, 550974), (78, 275487), (117, 183658), (229, 93834), (234, 91829), (401, 53586), (458, 46917), (687, 31278), (802, 26793), (1203, 17862), (1374, 15639), (2061, 10426), (2406, 8931), (2977, 7218), (3609, 5954), (4122, 5213)]