21278346908

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{262139}}^1$

素因数の和:262386

約数の個数: 48

約数和(自身を含む): 46035978240

約数和(自身を除く): 24757631332

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 223, 364, 446, 892, 1561, 2899, 3122, 5798, 6244, 11596, 20293, 40586, 81172, 262139, 524278, 1048556, 1834973, 3407807, 3669946, 6815614, 7339892, 13631228, 23854649, 47709298, 58456997, 95418596, 116913994, 233827988, 409198979, 759940961, 818397958, 1519881922, 1636795916, 3039763844, 5319586727, 10639173454, 21278346908]

約数ペア:

[(1, 21278346908), (2, 10639173454), (4, 5319586727), (7, 3039763844), (13, 1636795916), (14, 1519881922), (26, 818397958), (28, 759940961), (52, 409198979), (91, 233827988), (182, 116913994), (223, 95418596), (364, 58456997), (446, 47709298), (892, 23854649), (1561, 13631228), (2899, 7339892), (3122, 6815614), (5798, 3669946), (6244, 3407807), (11596, 1834973), (20293, 1048556), (40586, 524278), (81172, 262139)]