20631416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 44906400

約数和(自身を除く): 24274984

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 53, 76, 104, 106, 152, 197, 212, 247, 394, 424, 494, 689, 788, 988, 1007, 1378, 1576, 1976, 2014, 2561, 2756, 3743, 4028, 5122, 5512, 7486, 8056, 10244, 10441, 13091, 14972, 20488, 20882, 26182, 29944, 41764, 48659, 52364, 83528, 97318, 104728, 135733, 194636, 198379, 271466, 389272, 396758, 542932, 793516, 1085864, 1587032, 2578927, 5157854, 10315708, 20631416]

約数ペア:

[(1, 20631416), (2, 10315708), (4, 5157854), (8, 2578927), (13, 1587032), (19, 1085864), (26, 793516), (38, 542932), (52, 396758), (53, 389272), (76, 271466), (104, 198379), (106, 194636), (152, 135733), (197, 104728), (212, 97318), (247, 83528), (394, 52364), (424, 48659), (494, 41764), (689, 29944), (788, 26182), (988, 20882), (1007, 20488), (1378, 14972), (1576, 13091), (1976, 10441), (2014, 10244), (2561, 8056), (2756, 7486), (3743, 5512), (4028, 5122)]