21000434728

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1579}}^1\times {\mathrm{18269}}^1$

素因数の和:19874

約数の個数: 64

約数和(自身を含む): 48495888000

約数和(自身を除く): 27495453272

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728, 1579, 3158, 6316, 11053, 12632, 18269, 20527, 22106, 36538, 41054, 44212, 73076, 82108, 88424, 127883, 143689, 146152, 164216, 237497, 255766, 287378, 474994, 511532, 574756, 949988, 1023064, 1149512, 1662479, 1899976, 3324958, 6649916, 13299832, 28846751, 57693502, 115387004, 201927257, 230774008, 375007763, 403854514, 750015526, 807709028, 1500031052, 1615418056, 2625054341, 3000062104, 5250108682, 10500217364, 21000434728]

約数ペア:

[(1, 21000434728), (2, 10500217364), (4, 5250108682), (7, 3000062104), (8, 2625054341), (13, 1615418056), (14, 1500031052), (26, 807709028), (28, 750015526), (52, 403854514), (56, 375007763), (91, 230774008), (104, 201927257), (182, 115387004), (364, 57693502), (728, 28846751), (1579, 13299832), (3158, 6649916), (6316, 3324958), (11053, 1899976), (12632, 1662479), (18269, 1149512), (20527, 1023064), (22106, 949988), (36538, 574756), (41054, 511532), (44212, 474994), (73076, 287378), (82108, 255766), (88424, 237497), (127883, 164216), (143689, 146152)]