20725022720

素因数分解:

$2^{14}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8161}}^1$

素因数の和:8225

約数の個数: 120

約数和(自身を含む): 51349296768

約数和(自身を除く): 30624274048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1024, 1240, 1280, 1984, 2048, 2480, 2560, 3968, 4096, 4960, 5120, 7936, 8161, 8192, 9920, 10240, 15872, 16322, 16384, 19840, 20480, 31744, 32644, 39680, 40805, 40960, 63488, 65288, 79360, 81610, 81920, 126976, 130576, 158720, 163220, 252991, 253952, 261152, 317440, 326440, 505982, 507904, 522304, 634880, 652880, 1011964, 1044608, 1264955, 1269760, 1305760, 2023928, 2089216, 2529910, 2539520, 2611520, 4047856, 4178432, 5059820, 5223040, 8095712, 8356864, 10119640, 10446080, 16191424, 16713728, 20239280, 20892160, 32382848, 33427456, 40478560, 41784320, 64765696, 66854912, 80957120, 83568640, 129531392, 133709824, 161914240, 167137280, 259062784, 323828480, 334274560, 518125568, 647656960, 668549120, 1036251136, 1295313920, 2072502272, 2590627840, 4145004544, 5181255680, 10362511360, 20725022720]

約数ペア:

[(1, 20725022720), (2, 10362511360), (4, 5181255680), (5, 4145004544), (8, 2590627840), (10, 2072502272), (16, 1295313920), (20, 1036251136), (31, 668549120), (32, 647656960), (40, 518125568), (62, 334274560), (64, 323828480), (80, 259062784), (124, 167137280), (128, 161914240), (155, 133709824), (160, 129531392), (248, 83568640), (256, 80957120), (310, 66854912), (320, 64765696), (496, 41784320), (512, 40478560), (620, 33427456), (640, 32382848), (992, 20892160), (1024, 20239280), (1240, 16713728), (1280, 16191424), (1984, 10446080), (2048, 10119640), (2480, 8356864), (2560, 8095712), (3968, 5223040), (4096, 5059820), (4960, 4178432), (5120, 4047856), (7936, 2611520), (8161, 2539520), (8192, 2529910), (9920, 2089216), (10240, 2023928), (15872, 1305760), (16322, 1269760), (16384, 1264955), (19840, 1044608), (20480, 1011964), (31744, 652880), (32644, 634880), (39680, 522304), (40805, 507904), (40960, 505982), (63488, 326440), (65288, 317440), (79360, 261152), (81610, 253952), (81920, 252991), (126976, 163220), (130576, 158720)]