20401472015

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{181}}^1\times {\mathrm{251}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 27078105600

約数和(自身を除く): 6676633585

約数列:

[1, 5, 19, 29, 95, 145, 163, 181, 251, 551, 815, 905, 1255, 2755, 3097, 3439, 4727, 4769, 5249, 7279, 15485, 17195, 23635, 23845, 26245, 29503, 36395, 40913, 45431, 89813, 99731, 138301, 147515, 204565, 227155, 449065, 498655, 560557, 691505, 777347, 855587, 863189, 1186477, 1317499, 2802785, 3886735, 4277935, 4315945, 5932385, 6587495, 7405253, 16256153, 22543063, 25032481, 37026265, 81280765, 112715315, 125162405, 140699807, 214752337, 703499035, 1073761685, 4080294403, 20401472015]

約数ペア:

[(1, 20401472015), (5, 4080294403), (19, 1073761685), (29, 703499035), (95, 214752337), (145, 140699807), (163, 125162405), (181, 112715315), (251, 81280765), (551, 37026265), (815, 25032481), (905, 22543063), (1255, 16256153), (2755, 7405253), (3097, 6587495), (3439, 5932385), (4727, 4315945), (4769, 4277935), (5249, 3886735), (7279, 2802785), (15485, 1317499), (17195, 1186477), (23635, 863189), (23845, 855587), (26245, 777347), (29503, 691505), (36395, 560557), (40913, 498655), (45431, 449065), (89813, 227155), (99731, 204565), (138301, 147515)]