1999496320

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{557}}^1$

素因数の和:726

約数の個数: 128

約数和(自身を含む): 4917542400

約数和(自身を除く): 2918046080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 79, 80, 128, 142, 158, 160, 284, 316, 320, 355, 395, 557, 568, 632, 640, 710, 790, 1114, 1136, 1264, 1420, 1580, 2228, 2272, 2528, 2785, 2840, 3160, 4456, 4544, 5056, 5570, 5609, 5680, 6320, 8912, 9088, 10112, 11140, 11218, 11360, 12640, 17824, 22280, 22436, 22720, 25280, 28045, 35648, 39547, 44003, 44560, 44872, 45440, 50560, 56090, 71296, 79094, 88006, 89120, 89744, 112180, 158188, 176012, 178240, 179488, 197735, 220015, 224360, 316376, 352024, 356480, 358976, 395470, 440030, 448720, 632752, 704048, 717952, 790940, 880060, 897440, 1265504, 1408096, 1581880, 1760120, 1794880, 2531008, 2816192, 3124213, 3163760, 3520240, 3589760, 5062016, 5632384, 6248426, 6327520, 7040480, 12496852, 12655040, 14080960, 15621065, 24993704, 25310080, 28161920, 31242130, 49987408, 62484260, 99974816, 124968520, 199949632, 249937040, 399899264, 499874080, 999748160, 1999496320]

約数ペア:

[(1, 1999496320), (2, 999748160), (4, 499874080), (5, 399899264), (8, 249937040), (10, 199949632), (16, 124968520), (20, 99974816), (32, 62484260), (40, 49987408), (64, 31242130), (71, 28161920), (79, 25310080), (80, 24993704), (128, 15621065), (142, 14080960), (158, 12655040), (160, 12496852), (284, 7040480), (316, 6327520), (320, 6248426), (355, 5632384), (395, 5062016), (557, 3589760), (568, 3520240), (632, 3163760), (640, 3124213), (710, 2816192), (790, 2531008), (1114, 1794880), (1136, 1760120), (1264, 1581880), (1420, 1408096), (1580, 1265504), (2228, 897440), (2272, 880060), (2528, 790940), (2785, 717952), (2840, 704048), (3160, 632752), (4456, 448720), (4544, 440030), (5056, 395470), (5570, 358976), (5609, 356480), (5680, 352024), (6320, 316376), (8912, 224360), (9088, 220015), (10112, 197735), (11140, 179488), (11218, 178240), (11360, 176012), (12640, 158188), (17824, 112180), (22280, 89744), (22436, 89120), (22720, 88006), (25280, 79094), (28045, 71296), (35648, 56090), (39547, 50560), (44003, 45440), (44560, 44872)]