20121631216

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{373}}^1\times {\mathrm{881}}^1$

素因数の和:1394

約数の個数: 80

約数和(自身を含む): 40494595680

約数和(自身を除く): 20372964464

約数列:

[1, 2, 4, 8, 16, 43, 86, 89, 172, 178, 344, 356, 373, 688, 712, 746, 881, 1424, 1492, 1762, 2984, 3524, 3827, 5968, 7048, 7654, 14096, 15308, 16039, 30616, 32078, 33197, 37883, 61232, 64156, 66394, 75766, 78409, 128312, 132788, 151532, 156818, 256624, 265576, 303064, 313636, 328613, 531152, 606128, 627272, 657226, 1254544, 1314452, 1427471, 2628904, 2854942, 3371587, 5257808, 5709884, 6743174, 11419768, 13486348, 14130359, 22839536, 26972696, 28260718, 29246557, 53945392, 56521436, 58493114, 113042872, 116986228, 226085744, 233972456, 467944912, 1257601951, 2515203902, 5030407804, 10060815608, 20121631216]

約数ペア:

[(1, 20121631216), (2, 10060815608), (4, 5030407804), (8, 2515203902), (16, 1257601951), (43, 467944912), (86, 233972456), (89, 226085744), (172, 116986228), (178, 113042872), (344, 58493114), (356, 56521436), (373, 53945392), (688, 29246557), (712, 28260718), (746, 26972696), (881, 22839536), (1424, 14130359), (1492, 13486348), (1762, 11419768), (2984, 6743174), (3524, 5709884), (3827, 5257808), (5968, 3371587), (7048, 2854942), (7654, 2628904), (14096, 1427471), (15308, 1314452), (16039, 1254544), (30616, 657226), (32078, 627272), (33197, 606128), (37883, 531152), (61232, 328613), (64156, 313636), (66394, 303064), (75766, 265576), (78409, 256624), (128312, 156818), (132788, 151532)]