21508741960

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{94819}}^1$

素因数の和:94990

約数の個数: 64

約数和(自身を含む): 49769121600

約数和(自身を除く): 28260379640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 107, 212, 214, 265, 424, 428, 530, 535, 856, 1060, 1070, 2120, 2140, 4280, 5671, 11342, 22684, 28355, 45368, 56710, 94819, 113420, 189638, 226840, 379276, 474095, 758552, 948190, 1896380, 3792760, 5025407, 10050814, 10145633, 20101628, 20291266, 25127035, 40203256, 40582532, 50254070, 50728165, 81165064, 100508140, 101456330, 201016280, 202912660, 405825320, 537718549, 1075437098, 2150874196, 2688592745, 4301748392, 5377185490, 10754370980, 21508741960]

約数ペア:

[(1, 21508741960), (2, 10754370980), (4, 5377185490), (5, 4301748392), (8, 2688592745), (10, 2150874196), (20, 1075437098), (40, 537718549), (53, 405825320), (106, 202912660), (107, 201016280), (212, 101456330), (214, 100508140), (265, 81165064), (424, 50728165), (428, 50254070), (530, 40582532), (535, 40203256), (856, 25127035), (1060, 20291266), (1070, 20101628), (2120, 10145633), (2140, 10050814), (4280, 5025407), (5671, 3792760), (11342, 1896380), (22684, 948190), (28355, 758552), (45368, 474095), (56710, 379276), (94819, 226840), (113420, 189638)]